393694090 has 32 divisors (see below), whose sum is σ = 725324544. Its totient is φ = 153787200.

The previous prime is 393694087. The next prime is 393694127. The reversal of 393694090 is 90496393.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374065 + ... + 375115.

It is an arithmetic number, because the mean of its divisors is an integer number (22666392).

Almost surely, 2^393694090 is an apocalyptic number.

393694090 is a deficient number, since it is larger than the sum of its proper divisors (331630454).

393694090 is a wasteful number, since it uses less digits than its factorization.

393694090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 393694090 is about 19841.7259833917. The cubic root of 393694090 is about 732.9139114476.

The spelling of 393694090 in words is "three hundred ninety-three million, six hundred ninety-four thousand, ninety".