3978402 has 32 divisors (see below), whose sum is σ = 8404992. Its totient is φ = 1252944.

The previous prime is 3978349. The next prime is 3978421. The reversal of 3978402 is 2048793.

3978402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17413 + ... + 17639.

It is an arithmetic number, because the mean of its divisors is an integer number (262656).

Almost surely, 2^3978402 is an apocalyptic number.

3978402 is an abundant number, since it is smaller than the sum of its proper divisors (4426590).

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

3978402 is a wasteful number, since it uses less digits than its factorization.

3978402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 3978402 is about 1994.5931916057. The cubic root of 3978402 is about 158.4538836933.

The spelling of 3978402 in words is "three million, nine hundred seventy-eight thousand, four hundred two".