Search a number
-
+
25405240 = 2357412213
BaseRepresentation
bin110000011101…
…0011100111000
31202210201102211
41200322130320
523000431430
62304304504
7425640520
oct140723470
952721384
1025405240
1113382373
128612134
1353567b3
143534680
15236c72a
hex183a738

25405240 has 64 divisors (see below), whose sum is σ = 66951360. Its totient is φ = 8494080.

The previous prime is 25405231. The next prime is 25405253. The reversal of 25405240 is 4250452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10374 + ... + 12586.

It is an arithmetic number, because the mean of its divisors is an integer number (1046115).

Almost surely, 225405240 is an apocalyptic number.

25405240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25405240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33475680).

25405240 is an abundant number, since it is smaller than the sum of its proper divisors (41546120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25405240 is a wasteful number, since it uses less digits than its factorization.

25405240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272 (or 2268 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 25405240 is about 5040.3610981754. The cubic root of 25405240 is about 293.9732185949.

Adding to 25405240 its reverse (4250452), we get a palindrome (29655692).

The spelling of 25405240 in words is "twenty-five million, four hundred five thousand, two hundred forty".

Divisors: 1 2 4 5 7 8 10 14 20 28 35 40 41 56 70 82 140 164 205 280 287 328 410 574 820 1148 1435 1640 2213 2296 2870 4426 5740 8852 11065 11480 15491 17704 22130 30982 44260 61964 77455 88520 90733 123928 154910 181466 309820 362932 453665 619640 635131 725864 907330 1270262 1814660 2540524 3175655 3629320 5081048 6351310 12702620 25405240