398501812900 has 27 divisors (see below), whose sum is σ = 864762632769. Its totient is φ = 159398200080.

The previous prime is 398501812889. The next prime is 398501812931. The reversal of 398501812900 is 9218105893.

The square root of 398501812900 is 631270.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 143460652644 + 255041160256 = 378762^2 + 505016^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6281137 + ... + 6344263.

Almost surely, 2^398501812900 is an apocalyptic number.

398501812900 is the 631270-th square number.

It is an amenable number.

398501812900 is an abundant number, since it is smaller than the sum of its proper divisors (466260819869).

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

398501812900 is an frugal number, since it uses more digits than its factorization.

398501812900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126268 (or 63134 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 398501812900 in words is "three hundred ninety-eight billion, five hundred one million, eight hundred twelve thousand, nine hundred".