398794752 has 140 divisors (see below), whose sum is σ = 1193370486. Its totient is φ = 132710400.

The previous prime is 398794729. The next prime is 398794777. The reversal of 398794752 is 257497893.

It can be written as a sum of positive squares in only one way, i.e., 279023616 + 119771136 = 16704^2 + 10944^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 663252 + ... + 663852.

Almost surely, 2^398794752 is an apocalyptic number.

398794752 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 398794752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (596685243).

398794752 is an abundant number, since it is smaller than the sum of its proper divisors (794575734).

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

398794752 is an frugal number, since it uses more digits than its factorization.

398794752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 606 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 398794752 is about 19969.8460685104. The cubic root of 398794752 is about 736.0655266171.

The spelling of 398794752 in words is "three hundred ninety-eight million, seven hundred ninety-four thousand, seven hundred fifty-two".