398561792 has 40 divisors (see below), whose sum is σ = 822066432. Its totient is φ = 192844800.

The previous prime is 398561773. The next prime is 398561809. The reversal of 398561792 is 297165893.

It is a self number, because there is not a number n which added to its sum of digits gives 398561792.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3317 + ... + 28427.

Almost surely, 2^398561792 is an apocalyptic number.

398561792 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 398561792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411033216).

398561792 is an abundant number, since it is smaller than the sum of its proper divisors (423504640).

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

398561792 is an equidigital number, since it uses as much as digits as its factorization.

398561792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25160 (or 25144 counting only the distinct ones).

The product of its digits is 816480, while the sum is 50.

The square root of 398561792 is about 19964.0124223564. The cubic root of 398561792 is about 735.9221719846.

The spelling of 398561792 in words is "three hundred ninety-eight million, five hundred sixty-one thousand, seven hundred ninety-two".