3975978 has 16 divisors (see below), whose sum is σ = 8370720. Its totient is φ = 1255536.

The previous prime is 3975971. The next prime is 3976001. The reversal of 3975978 is 8795793.

It is not an unprimeable number, because it can be changed into a prime (3975971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17325 + ... + 17552.

It is an arithmetic number, because the mean of its divisors is an integer number (523170).

Almost surely, 2^3975978 is an apocalyptic number.

3975978 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3975978 is an abundant number, since it is smaller than the sum of its proper divisors (4394742).

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

3975978 is a wasteful number, since it uses less digits than its factorization.

3975978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34901.

The product of its digits is 476280, while the sum is 48.

The square root of 3975978 is about 1993.9854563161. The cubic root of 3975978 is about 158.4216957070.

The spelling of 3975978 in words is "three million, nine hundred seventy-five thousand, nine hundred seventy-eight".