390491426 has 16 divisors (see below), whose sum is σ = 632431800. Its totient is φ = 179758848.

The previous prime is 390491417. The next prime is 390491443. The reversal of 390491426 is 624194093.

It can be written as a sum of positive squares in 4 ways, for example, as 174372025 + 216119401 = 13205^2 + 14701^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 390491426.

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, 9191 + ... + 29418.

Almost surely, 2^390491426 is an apocalyptic number.

390491426 is a deficient number, since it is larger than the sum of its proper divisors (241940374).

390491426 is a wasteful number, since it uses less digits than its factorization.

390491426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39013.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 390491426 is about 19760.8559025160. The cubic root of 390491426 is about 730.9211028684.

The spelling of 390491426 in words is "three hundred ninety million, four hundred ninety-one thousand, four hundred twenty-six".