390640846 has 16 divisors (see below), whose sum is σ = 617608800. Its totient is φ = 185025568.

The previous prime is 390640837. The next prime is 390640867. The reversal of 390640846 is 648046093.

It is a junction number, because it is equal to n+sod(n) for n = 390640799 and 390640808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60466 + ... + 66613.

It is an arithmetic number, because the mean of its divisors is an integer number (38600550).

Almost surely, 2^390640846 is an apocalyptic number.

390640846 is a deficient number, since it is larger than the sum of its proper divisors (226967954).

390640846 is a wasteful number, since it uses less digits than its factorization.

390640846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127163.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 390640846 is about 19764.6362476014. The cubic root of 390640846 is about 731.0143190030.

The spelling of 390640846 in words is "three hundred ninety million, six hundred forty thousand, eight hundred forty-six".