3897131532 has 24 divisors (see below), whose sum is σ = 10392350976. Its totient is φ = 1113466128.

The previous prime is 3897131531. The next prime is 3897131573. The reversal of 3897131532 is 2351317983.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (3897131531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23197128 + ... + 23197295.

It is an arithmetic number, because the mean of its divisors is an integer number (433014624).

Almost surely, 2^3897131532 is an apocalyptic number.

It is an amenable number.

3897131532 is an abundant number, since it is smaller than the sum of its proper divisors (6495219444).

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

3897131532 is a wasteful number, since it uses less digits than its factorization.

3897131532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46394437 (or 46394435 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 3897131532 is about 62427.0096352532. The cubic root of 3897131532 is about 1573.6749122903.

The spelling of 3897131532 in words is "three billion, eight hundred ninety-seven million, one hundred thirty-one thousand, five hundred thirty-two".