3925978 has 32 divisors (see below), whose sum is σ = 7056000. Its totient is φ = 1636992.

The previous prime is 3925973. The next prime is 3925981. The reversal of 3925978 is 8795293.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3925973) 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, 40426 + ... + 40522.

It is an arithmetic number, because the mean of its divisors is an integer number (220500).

Almost surely, 2^3925978 is an apocalyptic number.

3925978 is a deficient number, since it is larger than the sum of its proper divisors (3130022).

3925978 is an equidigital number, since it uses as much as digits as its factorization.

3925978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 165 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 3925978 is about 1981.4080851758. The cubic root of 3925978 is about 157.7548138605.

The spelling of 3925978 in words is "three million, nine hundred twenty-five thousand, nine hundred seventy-eight".