393115388 has 6 divisors (see below), whose sum is σ = 687951936. Its totient is φ = 196557692.

The previous prime is 393115351. The next prime is 393115409. The reversal of 393115388 is 883511393.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49139420 + ... + 49139427.

It is an arithmetic number, because the mean of its divisors is an integer number (114658656).

Almost surely, 2^393115388 is an apocalyptic number.

It is an amenable number.

393115388 is a deficient number, since it is larger than the sum of its proper divisors (294836548).

393115388 is a wasteful number, since it uses less digits than its factorization.

393115388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98278851 (or 98278849 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 393115388 is about 19827.1376653313. The cubic root of 393115388 is about 732.5546251008.

The spelling of 393115388 in words is "three hundred ninety-three million, one hundred fifteen thousand, three hundred eighty-eight".