398957836 has 12 divisors (see below), whose sum is σ = 739245528. Its totient is φ = 187744832.

The previous prime is 398957813. The next prime is 398957849. The reversal of 398957836 is 638759893.

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, 2933446 + ... + 2933581.

It is an arithmetic number, because the mean of its divisors is an integer number (61603794).

Almost surely, 2^398957836 is an apocalyptic number.

It is an amenable number.

398957836 is a deficient number, since it is larger than the sum of its proper divisors (340287692).

398957836 is a wasteful number, since it uses less digits than its factorization.

398957836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5867048 (or 5867046 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 58.

The square root of 398957836 is about 19973.9289074533. The cubic root of 398957836 is about 736.1658490263.

The spelling of 398957836 in words is "three hundred ninety-eight million, nine hundred fifty-seven thousand, eight hundred thirty-six".