398388388 has 6 divisors (see below), whose sum is σ = 697179686. Its totient is φ = 199194192.

The previous prime is 398388337. The next prime is 398388391. The reversal of 398388388 is 883883893.

It can be written as a sum of positive squares in only one way, i.e., 347151424 + 51236964 = 18632^2 + 7158^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49798545 + ... + 49798552.

Almost surely, 2^398388388 is an apocalyptic number.

It is an amenable number.

398388388 is a deficient number, since it is larger than the sum of its proper divisors (298791298).

398388388 is a wasteful number, since it uses less digits than its factorization.

398388388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99597101 (or 99597099 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 58.

The square root of 398388388 is about 19959.6690353322. The cubic root of 398388388 is about 735.8154295571.

The spelling of 398388388 in words is "three hundred ninety-eight million, three hundred eighty-eight thousand, three hundred eighty-eight".