3891264560 has 20 divisors (see below), whose sum is σ = 9047190288. Its totient is φ = 1556505792.

The previous prime is 3891264557. The next prime is 3891264563. The reversal of 3891264560 is 654621983.

It is an interprime number because it is at equal distance from previous prime (3891264557) and next prime (3891264563).

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3891264563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24320324 + ... + 24320483.

Almost surely, 2^3891264560 is an apocalyptic number.

It is an amenable number.

3891264560 is an abundant number, since it is smaller than the sum of its proper divisors (5155925728).

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

3891264560 is a wasteful number, since it uses less digits than its factorization.

3891264560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48640820 (or 48640814 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 3891264560 is about 62380.0012824623. The cubic root of 3891264560 is about 1572.8848146159.

The spelling of 3891264560 in words is "three billion, eight hundred ninety-one million, two hundred sixty-four thousand, five hundred sixty".