398836764 has 48 divisors (see below), whose sum is σ = 1061978400. Its totient is φ = 129351168.

The previous prime is 398836751. The next prime is 398836787. The reversal of 398836764 is 467638893.

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

It is a self number, because there is not a number n which added to its sum of digits gives 398836764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45909 + ... + 53900.

It is an arithmetic number, because the mean of its divisors is an integer number (22124550).

Almost surely, 2^398836764 is an apocalyptic number.

It is an amenable number.

398836764 is an abundant number, since it is smaller than the sum of its proper divisors (663141636).

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

398836764 is a wasteful number, since it uses less digits than its factorization.

398836764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99859 (or 99851 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 398836764 is about 19970.8979267333. The cubic root of 398836764 is about 736.0913732453.

The spelling of 398836764 in words is "three hundred ninety-eight million, eight hundred thirty-six thousand, seven hundred sixty-four".