398544432 has 160 divisors (see below), whose sum is σ = 1249253376. Its totient is φ = 107827200.

The previous prime is 398544409. The next prime is 398544451. The reversal of 398544432 is 234445893.

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 31 ways as a sum of consecutive naturals, for example, 211848 + ... + 213720.

Almost surely, 2^398544432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398544432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (624626688).

398544432 is an abundant number, since it is smaller than the sum of its proper divisors (850708944).

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

398544432 is a wasteful number, since it uses less digits than its factorization.

398544432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939 (or 1933 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 398544432 is about 19963.5776352837. The cubic root of 398544432 is about 735.9114870715.

The spelling of 398544432 in words is "three hundred ninety-eight million, five hundred forty-four thousand, four hundred thirty-two".