3867978 has 16 divisors (see below), whose sum is σ = 7842816. Its totient is φ = 1271520.

The previous prime is 3867961. The next prime is 3868003. The reversal of 3867978 is 8797683.

It is a super-2 number, since 2×3867978² = 29922507616968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3978 + ... + 4853.

It is an arithmetic number, because the mean of its divisors is an integer number (490176).

Almost surely, 2^3867978 is an apocalyptic number.

3867978 is an abundant number, since it is smaller than the sum of its proper divisors (3974838).

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

3867978 is a wasteful number, since it uses less digits than its factorization.

3867978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8909.

The product of its digits is 508032, while the sum is 48.

The square root of 3867978 is about 1966.7175699627. The cubic root of 3867978 is about 156.9740988010.

The spelling of 3867978 in words is "three million, eight hundred sixty-seven thousand, nine hundred seventy-eight".