398273181 has 16 divisors (see below), whose sum is σ = 550837056. Its totient is φ = 255782016.

The previous prime is 398273167. The next prime is 398273203. The reversal of 398273181 is 181372893.

It is not a de Polignac number, because 398273181 - 2⁵ = 398273149 is a prime.

It is a super-2 number, since 2×398273181² = 317243053407717522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398273881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11730 + ... + 30563.

It is an arithmetic number, because the mean of its divisors is an integer number (34427316).

Almost surely, 2^398273181 is an apocalyptic number.

It is an amenable number.

398273181 is a deficient number, since it is larger than the sum of its proper divisors (152563875).

398273181 is a wasteful number, since it uses less digits than its factorization.

398273181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42412.

The product of its digits is 72576, while the sum is 42.

The square root of 398273181 is about 19956.7828319096. The cubic root of 398273181 is about 735.7444943729.

The spelling of 398273181 in words is "three hundred ninety-eight million, two hundred seventy-three thousand, one hundred eighty-one".