393690344 has 8 divisors (see below), whose sum is σ = 738169410. Its totient is φ = 196845168.

The previous prime is 393690337. The next prime is 393690361. The reversal of 393690344 is 443096393.

It can be written as a sum of positive squares in only one way, i.e., 261210244 + 132480100 = 16162^2 + 11510^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24605639 + ... + 24605654.

Almost surely, 2^393690344 is an apocalyptic number.

It is an amenable number.

393690344 is a deficient number, since it is larger than the sum of its proper divisors (344479066).

393690344 is a wasteful number, since it uses less digits than its factorization.

393690344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49211299 (or 49211295 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 41.

The square root of 393690344 is about 19841.6315861373. The cubic root of 393690344 is about 732.9115868812.

The spelling of 393690344 in words is "three hundred ninety-three million, six hundred ninety thousand, three hundred forty-four".