398734272 has 112 divisors (see below), whose sum is σ = 1192377600. Its totient is φ = 130625280.

The previous prime is 398734243. The next prime is 398734291. The reversal of 398734272 is 272437893.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99997 + ... + 103907.

Almost surely, 2^398734272 is an apocalyptic number.

398734272 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398734272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (596188800).

398734272 is an abundant number, since it is smaller than the sum of its proper divisors (793643328).

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

398734272 is a wasteful number, since it uses less digits than its factorization.

398734272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991 (or 3975 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 398734272 is about 19968.3317280137. The cubic root of 398734272 is about 736.0283149157.

The spelling of 398734272 in words is "three hundred ninety-eight million, seven hundred thirty-four thousand, two hundred seventy-two".