390634386 has 16 divisors (see below), whose sum is σ = 781480224. Its totient is φ = 130176224.

The previous prime is 390634373. The next prime is 390634393. The reversal of 390634386 is 683436093.

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, 25465 + ... + 37811.

It is an arithmetic number, because the mean of its divisors is an integer number (48842514).

Almost surely, 2^390634386 is an apocalyptic number.

390634386 is an abundant number, since it is smaller than the sum of its proper divisors (390845838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390634386 is a wasteful number, since it uses less digits than its factorization.

390634386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17625.

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 390634386 is about 19764.4728237310. The cubic root of 390634386 is about 731.0102894035.

The spelling of 390634386 in words is "three hundred ninety million, six hundred thirty-four thousand, three hundred eighty-six".