390880670 has 16 divisors (see below), whose sum is σ = 718555968. Its totient is φ = 153025440.

The previous prime is 390880669. The next prime is 390880687. The reversal of 390880670 is 76088093.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 415361 + ... + 416300.

It is an arithmetic number, because the mean of its divisors is an integer number (44909748).

Almost surely, 2^390880670 is an apocalyptic number.

390880670 is a deficient number, since it is larger than the sum of its proper divisors (327675298).

390880670 is a wasteful number, since it uses less digits than its factorization.

390880670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831715.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 390880670 is about 19770.7023142831. The cubic root of 390880670 is about 731.1638842754.

The spelling of 390880670 in words is "three hundred ninety million, eight hundred eighty thousand, six hundred seventy".