3656021862 has 32 divisors (see below), whose sum is σ = 7365359232. Its totient is φ = 1209821184.

The previous prime is 3656021861. The next prime is 3656021881. The reversal of 3656021862 is 2681206563.

It is a self number, because there is not a number n which added to its sum of digits gives 3656021862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656021861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469533 + ... + 477255.

It is an arithmetic number, because the mean of its divisors is an integer number (230167476).

Almost surely, 2^3656021862 is an apocalyptic number.

3656021862 is an abundant number, since it is smaller than the sum of its proper divisors (3709337370).

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

3656021862 is a wasteful number, since it uses less digits than its factorization.

3656021862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8292.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 3656021862 is about 60465.0466137255. The cubic root of 3656021862 is about 1540.5279943074.

The spelling of 3656021862 in words is "three billion, six hundred fifty-six million, twenty-one thousand, eight hundred sixty-two".