Search a number
-
+
7989460 = 225399473
BaseRepresentation
bin11110011110100011010100
3120000220110221
4132132203110
54021130320
6443124124
7124623613
oct36364324
916026427
107989460
114567666
122813644
1318696bb
1410bd87a
15a7c3aa
hex79e8d4

7989460 has 12 divisors (see below), whose sum is σ = 16777908. Its totient is φ = 3195776.

The previous prime is 7989437. The next prime is 7989461. The reversal of 7989460 is 649897.

It can be written as a sum of positive squares in 2 ways, for example, as 6320196 + 1669264 = 2514^2 + 1292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7989461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199717 + ... + 199756.

It is an arithmetic number, because the mean of its divisors is an integer number (1398159).

Almost surely, 27989460 is an apocalyptic number.

It is an amenable number.

7989460 is an abundant number, since it is smaller than the sum of its proper divisors (8788448).

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

7989460 is a wasteful number, since it uses less digits than its factorization.

7989460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399482 (or 399480 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 7989460 is about 2826.5632842730. The cubic root of 7989460 is about 199.9121280649.

The spelling of 7989460 in words is "seven million, nine hundred eighty-nine thousand, four hundred sixty".

Divisors: 1 2 4 5 10 20 399473 798946 1597892 1997365 3994730 7989460