398817432 has 192 divisors, whose sum is σ = 1237716480. Its totient is φ = 119532672.

The previous prime is 398817431. The next prime is 398817439. The reversal of 398817432 is 234718893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398817431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1086513 + ... + 1086879.

It is an arithmetic number, because the mean of its divisors is an integer number (6446440).

Almost surely, 2^398817432 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 398817432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (618858240).

398817432 is an abundant number, since it is smaller than the sum of its proper divisors (838899048).

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

398817432 is a wasteful number, since it uses less digits than its factorization.

398817432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 428 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 398817432 is about 19970.4139165917. The cubic root of 398817432 is about 736.0794800352.

The spelling of 398817432 in words is "three hundred ninety-eight million, eight hundred seventeen thousand, four hundred thirty-two".