3856402000 has 80 divisors (see below), whose sum is σ = 10172545344. Its totient is φ = 1402320000.

The previous prime is 3856401979. The next prime is 3856402027. The reversal of 3856402000 is 2046583.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 3856402000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65646 + ... + 109645.

Almost surely, 2^3856402000 is an apocalyptic number.

It is an amenable number.

3856402000 is an abundant number, since it is smaller than the sum of its proper divisors (6316143344).

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

3856402000 is a wasteful number, since it uses less digits than its factorization.

3856402000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175325 (or 175309 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 3856402000 is about 62099.9355877283. The cubic root of 3856402000 is about 1568.1734610440.

Adding to 3856402000 its reverse (2046583), we get a palindrome (3858448583).

It can be divided in two parts, 385640 and 2000, that added together give a triangular number (387640 = T₈₈₀).

The spelling of 3856402000 in words is "three billion, eight hundred fifty-six million, four hundred two thousand".