3902856284820 has 48 divisors (see below), whose sum is σ = 11570820988608. Its totient is φ = 979540400640.

The previous prime is 3902856284819. The next prime is 3902856284827. The reversal of 3902856284820 is 284826582093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3902856284827) 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, 1913163826 + ... + 1913165865.

It is an arithmetic number, because the mean of its divisors is an integer number (241058770596).

Almost surely, 2^{3902856284820} is an apocalyptic number.

3902856284820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3902856284820 is an abundant number, since it is smaller than the sum of its proper divisors (7667964703788).

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

3902856284820 is a wasteful number, since it uses less digits than its factorization.

3902856284820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826329720 (or 3826329718 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 57.

The spelling of 3902856284820 in words is "three trillion, nine hundred two billion, eight hundred fifty-six million, two hundred eighty-four thousand, eight hundred twenty".