3897155808 has 576 divisors, whose sum is σ = 14583481920. Its totient is φ = 1003290624.

The previous prime is 3897155791. The next prime is 3897155827. The reversal of 3897155808 is 8085517983.

3897155808 is a `hidden beast` number, since 3 + 89 + 7 + 1 + 558 + 0 + 8 = 666.

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

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 40176816 + ... + 40176912.

It is an arithmetic number, because the mean of its divisors is an integer number (25318545).

Almost surely, 2^3897155808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3897155808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7291740960).

3897155808 is an abundant number, since it is smaller than the sum of its proper divisors (10686326112).

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

3897155808 is a wasteful number, since it uses less digits than its factorization.

3897155808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The square root of 3897155808 is about 62427.2040700206. The cubic root of 3897155808 is about 1573.6781798605.

The spelling of 3897155808 in words is "three billion, eight hundred ninety-seven million, one hundred fifty-five thousand, eight hundred eight".