3878135652 has 12 divisors (see below), whose sum is σ = 9048983216. Its totient is φ = 1292711880.

The previous prime is 3878135641. The next prime is 3878135707. The reversal of 3878135652 is 2565318783.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×3878135652² = 30079872270626930208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161588974 + ... + 161588997.

Almost surely, 2^3878135652 is an apocalyptic number.

It is an amenable number.

3878135652 is an abundant number, since it is smaller than the sum of its proper divisors (5170847564).

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

3878135652 is a wasteful number, since it uses less digits than its factorization.

3878135652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323177978 (or 323177976 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 48.

The square root of 3878135652 is about 62274.6790597912. The cubic root of 3878135652 is about 1571.1138797772.

The spelling of 3878135652 in words is "three billion, eight hundred seventy-eight million, one hundred thirty-five thousand, six hundred fifty-two".