390745634 has 16 divisors (see below), whose sum is σ = 590198400. Its totient is φ = 194018064.

The previous prime is 390745631. The next prime is 390745637. The reversal of 390745634 is 436547093.

It is an interprime number because it is at equal distance from previous prime (390745631) and next prime (390745637).

It is a junction number, because it is equal to n+sod(n) for n = 390745591 and 390745600.

It is not an unprimeable number, because it can be changed into a prime (390745631) 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 7 ways as a sum of consecutive naturals, for example, 196457 + ... + 198435.

It is an arithmetic number, because the mean of its divisors is an integer number (36887400).

Almost surely, 2^390745634 is an apocalyptic number.

390745634 is a deficient number, since it is larger than the sum of its proper divisors (199452766).

390745634 is a wasteful number, since it uses less digits than its factorization.

390745634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 390745634 is about 19767.2869660963. The cubic root of 390745634 is about 731.0796771454.

The spelling of 390745634 in words is "three hundred ninety million, seven hundred forty-five thousand, six hundred thirty-four".