390715705 has 16 divisors (see below), whose sum is σ = 473122944. Its totient is φ = 309742720.

The previous prime is 390715687. The next prime is 390715739. The reversal of 390715705 is 507517093.

It is a happy number.

It is not a de Polignac number, because 390715705 - 2¹⁵ = 390682937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409509 + ... + 410461.

It is an arithmetic number, because the mean of its divisors is an integer number (29570184).

Almost surely, 2^390715705 is an apocalyptic number.

It is an amenable number.

390715705 is a deficient number, since it is larger than the sum of its proper divisors (82407239).

390715705 is a wasteful number, since it uses less digits than its factorization.

390715705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616.

The product of its (nonzero) digits is 33075, while the sum is 37.

The square root of 390715705 is about 19766.5299180205. The cubic root of 390715705 is about 731.0610110872.

The spelling of 390715705 in words is "three hundred ninety million, seven hundred fifteen thousand, seven hundred five".