398967636 has 12 divisors (see below), whose sum is σ = 930924512. Its totient is φ = 132989208.

The previous prime is 398967629. The next prime is 398967659. The reversal of 398967636 is 636769893.

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, 16623640 + ... + 16623663.

Almost surely, 2^398967636 is an apocalyptic number.

It is an amenable number.

398967636 is an abundant number, since it is smaller than the sum of its proper divisors (531956876).

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

398967636 is a wasteful number, since it uses less digits than its factorization.

398967636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33247310 (or 33247308 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 57.

The square root of 398967636 is about 19974.1742257346. The cubic root of 398967636 is about 736.1718767027.

The spelling of 398967636 in words is "three hundred ninety-eight million, nine hundred sixty-seven thousand, six hundred thirty-six".