390490394 has 64 divisors (see below), whose sum is σ = 735436800. Its totient is φ = 151720128.

The previous prime is 390490393. The next prime is 390490411. The reversal of 390490394 is 493094093.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (390490393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1720109 + ... + 1720335.

It is an arithmetic number, because the mean of its divisors is an integer number (11491200).

Almost surely, 2^390490394 is an apocalyptic number.

390490394 is a deficient number, since it is larger than the sum of its proper divisors (344946406).

390490394 is a wasteful number, since it uses less digits than its factorization.

390490394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 390490394 is about 19760.8297902694. The cubic root of 390490394 is about 730.9204589693.

The spelling of 390490394 in words is "three hundred ninety million, four hundred ninety thousand, three hundred ninety-four".