3881215944 has 24 divisors (see below), whose sum is σ = 10511626710. Its totient is φ = 1293738624.

The previous prime is 3881215927. The next prime is 3881215979. The reversal of 3881215944 is 4495121883.

3881215944 is a `hidden beast` number, since 38 + 8 + 1 + 21 + 594 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2861180100 + 1020035844 = 53490^2 + 31938^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×3881215944² = 30127674407919622272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3881215944.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26952817 + ... + 26952960.

Almost surely, 2^3881215944 is an apocalyptic number.

It is an amenable number.

3881215944 is an abundant number, since it is smaller than the sum of its proper divisors (6630410766).

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

3881215944 is a wasteful number, since it uses less digits than its factorization.

3881215944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53905789 (or 53905782 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 3881215944 is about 62299.4056472451. The cubic root of 3881215944 is about 1571.5297332718.

It can be divided in two parts, 38812 and 15944, that added together give a square (54756 = 234²).

The spelling of 3881215944 in words is "three billion, eight hundred eighty-one million, two hundred fifteen thousand, nine hundred forty-four".