390946977 has 24 divisors (see below), whose sum is σ = 598669344. Its totient is φ = 244992384.

The previous prime is 390946973. The next prime is 390946979. The reversal of 390946977 is 779649093.

It is not a de Polignac number, because 390946977 - 2² = 390946973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390946973) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 226038 + ... + 227760.

It is an arithmetic number, because the mean of its divisors is an integer number (24944556).

Almost surely, 2^390946977 is an apocalyptic number.

It is an amenable number.

390946977 is a deficient number, since it is larger than the sum of its proper divisors (207722367).

390946977 is a wasteful number, since it uses less digits than its factorization.

390946977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229 (or 3226 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 54.

The square root of 390946977 is about 19772.3791436438. The cubic root of 390946977 is about 731.2052255732.

The spelling of 390946977 in words is "three hundred ninety million, nine hundred forty-six thousand, nine hundred seventy-seven".