390112978 has 24 divisors (see below), whose sum is σ = 633150000. Its totient is φ = 179772048.

The previous prime is 390112969. The next prime is 390112999. The reversal of 390112978 is 879211093.

It is a self number, because there is not a number n which added to its sum of digits gives 390112978.

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 11 ways as a sum of consecutive naturals, for example, 48273 + ... + 55771.

It is an arithmetic number, because the mean of its divisors is an integer number (26381250).

Almost surely, 2^390112978 is an apocalyptic number.

390112978 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

390112978 is a deficient number, since it is larger than the sum of its proper divisors (243037022).

390112978 is a wasteful number, since it uses less digits than its factorization.

390112978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7594 (or 7557 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 390112978 is about 19751.2778827093. The cubic root of 390112978 is about 730.6849004657.

The spelling of 390112978 in words is "three hundred ninety million, one hundred twelve thousand, nine hundred seventy-eight".