Search a number
-
+
1242440440 = 23534789513
BaseRepresentation
bin100101000001110…
…0010001011111000
310012120212111212121
41022003202023320
510021031043230
6323141451024
742534366223
oct11203421370
93176774777
101242440440
1158836398a
122a8110a74
1316a533a77
14bb01a5ba
157412077a
hex4a0e22f8

1242440440 has 32 divisors (see below), whose sum is σ = 2803578480. Its totient is φ = 495538432.

The previous prime is 1242440411. The next prime is 1242440443. The reversal of 1242440440 is 440442421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242440443) 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 7 ways as a sum of consecutive naturals, for example, 30877 + ... + 58636.

Almost surely, 21242440440 is an apocalyptic number.

1242440440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242440440 is an abundant number, since it is smaller than the sum of its proper divisors (1561138040).

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

1242440440 is a wasteful number, since it uses less digits than its factorization.

1242440440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89871 (or 89867 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 1242440440 is about 35248.2686099615. The cubic root of 1242440440 is about 1075.0414088971.

Adding to 1242440440 its reverse (440442421), we get a palindrome (1682882861).

The spelling of 1242440440 in words is "one billion, two hundred forty-two million, four hundred forty thousand, four hundred forty".

Divisors: 1 2 4 5 8 10 20 40 347 694 1388 1735 2776 3470 6940 13880 89513 179026 358052 447565 716104 895130 1790260 3580520 31061011 62122022 124244044 155305055 248488088 310610110 621220220 1242440440