3865722858 has 24 divisors (see below), whose sum is σ = 8407590048. Its totient is φ = 1283673192.

The previous prime is 3865722829. The next prime is 3865722859. The reversal of 3865722858 is 8582275683.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3865722859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 403560 + ... + 413027.

It is an arithmetic number, because the mean of its divisors is an integer number (350316252).

Almost surely, 2^3865722858 is an apocalyptic number.

3865722858 is an abundant number, since it is smaller than the sum of its proper divisors (4541867190).

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

3865722858 is a wasteful number, since it uses less digits than its factorization.

3865722858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816858 (or 816855 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 54.

The square root of 3865722858 is about 62174.9375391725. The cubic root of 3865722858 is about 1569.4358607120.

The spelling of 3865722858 in words is "three billion, eight hundred sixty-five million, seven hundred twenty-two thousand, eight hundred fifty-eight".