3897529920 has 112 divisors (see below), whose sum is σ = 13749649920. Its totient is φ = 1039339008.

The previous prime is 3897529879. The next prime is 3897529981. The reversal of 3897529920 is 299257983.

3897529920 is a `hidden beast` number, since 3 + 8 + 97 + 529 + 9 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 216912 + ... + 234191.

Almost surely, 2^3897529920 is an apocalyptic number.

3897529920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3897529920 is an abundant number, since it is smaller than the sum of its proper divisors (9852120000).

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

3897529920 is a wasteful number, since it uses less digits than its factorization.

3897529920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451129 (or 451113 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 3897529920 is about 62430.2003841090. The cubic root of 3897529920 is about 1573.7285339377.

The spelling of 3897529920 in words is "three billion, eight hundred ninety-seven million, five hundred twenty-nine thousand, nine hundred twenty".