3978830 has 16 divisors (see below), whose sum is σ = 7208784. Its totient is φ = 1581120.

The previous prime is 3978823. The next prime is 3978841. The reversal of 3978830 is 388793.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410 + ... + 2850.

It is an arithmetic number, because the mean of its divisors is an integer number (450549).

Almost surely, 2^3978830 is an apocalyptic number.

3978830 is a deficient number, since it is larger than the sum of its proper divisors (3229954).

3978830 is a wasteful number, since it uses less digits than its factorization.

3978830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 3978830 is about 1994.7004787687. The cubic root of 3978830 is about 158.4595656925.

The spelling of 3978830 in words is "three million, nine hundred seventy-eight thousand, eight hundred thirty".