3888740856 has 128 divisors (see below), whose sum is σ = 13053196800. Its totient is φ = 932359680.

The previous prime is 3888740851. The next prime is 3888740941. The reversal of 3888740856 is 6580478883.

It is a happy number.

It is a super-2 number, since 2×3888740856² = 30244610890247225472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3888740796 and 3888740805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3888740851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56911 + ... + 104958.

It is an arithmetic number, because the mean of its divisors is an integer number (101978100).

Almost surely, 2^3888740856 is an apocalyptic number.

It is an amenable number.

3888740856 is an abundant number, since it is smaller than the sum of its proper divisors (9164455944).

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

3888740856 is a wasteful number, since it uses less digits than its factorization.

3888740856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161909 (or 161905 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 57.

The square root of 3888740856 is about 62359.7695313252. The cubic root of 3888740856 is about 1572.5447063132.

The spelling of 3888740856 in words is "three billion, eight hundred eighty-eight million, seven hundred forty thousand, eight hundred fifty-six".