393437090 has 16 divisors (see below), whose sum is σ = 708418872. Its totient is φ = 157323264.

The previous prime is 393437087. The next prime is 393437101. The reversal of 393437090 is 90734393.

It can be written as a sum of positive squares in 4 ways, for example, as 391129729 + 2307361 = 19777^2 + 1519^2 .

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, 45602 + ... + 53538.

Almost surely, 2^393437090 is an apocalyptic number.

393437090 is a deficient number, since it is larger than the sum of its proper divisors (314981782).

393437090 is a wasteful number, since it uses less digits than its factorization.

393437090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12901.

The product of its (nonzero) digits is 61236, while the sum is 38.

The square root of 393437090 is about 19835.2486750230. The cubic root of 393437090 is about 732.7543968387.

The spelling of 393437090 in words is "three hundred ninety-three million, four hundred thirty-seven thousand, ninety".