398418804 has 144 divisors (see below), whose sum is σ = 1218067200. Its totient is φ = 112275072.

The previous prime is 398418739. The next prime is 398418821. The reversal of 398418804 is 408814893.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 398418804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 417592 + ... + 418544.

It is an arithmetic number, because the mean of its divisors is an integer number (8458800).

Almost surely, 2^398418804 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 398418804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (609033600).

398418804 is an abundant number, since it is smaller than the sum of its proper divisors (819648396).

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

398418804 is a wasteful number, since it uses less digits than its factorization.

398418804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 398418804 is about 19960.4309572714. The cubic root of 398418804 is about 735.8341549962.

The spelling of 398418804 in words is "three hundred ninety-eight million, four hundred eighteen thousand, eight hundred four".