398990180 has 24 divisors (see below), whose sum is σ = 849683520. Its totient is φ = 157347680.

The previous prime is 398990167. The next prime is 398990219. The reversal of 398990180 is 81099893.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139070 + ... + 141909.

It is an arithmetic number, because the mean of its divisors is an integer number (35403480).

Almost surely, 2^398990180 is an apocalyptic number.

It is an amenable number.

398990180 is an abundant number, since it is smaller than the sum of its proper divisors (450693340).

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

398990180 is a wasteful number, since it uses less digits than its factorization.

398990180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281059 (or 281057 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 398990180 is about 19974.7385464741. The cubic root of 398990180 is about 736.1857424441.

The spelling of 398990180 in words is "three hundred ninety-eight million, nine hundred ninety thousand, one hundred eighty".