389952978 has 8 divisors (see below), whose sum is σ = 779905968. Its totient is φ = 129984324.

The previous prime is 389952977. The next prime is 389953033. The reversal of 389952978 is 879259983.

It is a sphenic number, since it is the product of 3 distinct primes.

389952978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (389952977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32496076 + ... + 32496087.

It is an arithmetic number, because the mean of its divisors is an integer number (97488246).

Almost surely, 2^389952978 is an apocalyptic number.

389952978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

389952978 is a wasteful number, since it uses less digits than its factorization.

389952978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64992168.

The product of its digits is 9797760, while the sum is 60.

The square root of 389952978 is about 19747.2270964812. The cubic root of 389952978 is about 730.5849930224.

The spelling of 389952978 in words is "three hundred eighty-nine million, nine hundred fifty-two thousand, nine hundred seventy-eight".