398364636 has 12 divisors (see below), whose sum is σ = 929517512. Its totient is φ = 132788208.

The previous prime is 398364611. The next prime is 398364643. The reversal of 398364636 is 636463893.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16598515 + ... + 16598538.

Almost surely, 2^398364636 is an apocalyptic number.

It is an amenable number.

398364636 is an abundant number, since it is smaller than the sum of its proper divisors (531152876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398364636 is a wasteful number, since it uses less digits than its factorization.

398364636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33197060 (or 33197058 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 48.

The square root of 398364636 is about 19959.0740266176. The cubic root of 398364636 is about 735.8008061092.

The spelling of 398364636 in words is "three hundred ninety-eight million, three hundred sixty-four thousand, six hundred thirty-six".