398274520 has 32 divisors (see below), whose sum is σ = 1024135200. Its totient is φ = 136551168.

The previous prime is 398274511. The next prime is 398274553. The reversal of 398274520 is 25472893.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710925 + ... + 711484.

It is an arithmetic number, because the mean of its divisors is an integer number (32004225).

Almost surely, 2^398274520 is an apocalyptic number.

It is an amenable number.

398274520 is an abundant number, since it is smaller than the sum of its proper divisors (625860680).

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

398274520 is a wasteful number, since it uses less digits than its factorization.

398274520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422427 (or 1422423 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 398274520 is about 19956.8163793727. The cubic root of 398274520 is about 735.7453188998.

The spelling of 398274520 in words is "three hundred ninety-eight million, two hundred seventy-four thousand, five hundred twenty".