398551172 has 12 divisors (see below), whose sum is σ = 701497356. Its totient is φ = 198123360.

The previous prime is 398551171. The next prime is 398551183. The reversal of 398551172 is 271155893.

It can be written as a sum of positive squares in 2 ways, for example, as 239135296 + 159415876 = 15464^2 + 12626^2 .

It is not an unprimeable number, because it can be changed into a prime (398551171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287279 + ... + 288662.

It is an arithmetic number, because the mean of its divisors is an integer number (58458113).

Almost surely, 2^398551172 is an apocalyptic number.

It is an amenable number.

398551172 is a deficient number, since it is larger than the sum of its proper divisors (302946184).

398551172 is a wasteful number, since it uses less digits than its factorization.

398551172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576118 (or 576116 counting only the distinct ones).

The product of its digits is 75600, while the sum is 41.

The square root of 398551172 is about 19963.7464419883. The cubic root of 398551172 is about 735.9156355136.

The spelling of 398551172 in words is "three hundred ninety-eight million, five hundred fifty-one thousand, one hundred seventy-two".