398715804 has 24 divisors (see below), whose sum is σ = 1033707920. Its totient is φ = 132905232.

The previous prime is 398715761. The next prime is 398715827. The reversal of 398715804 is 408517893.

It is a self number, because there is not a number n which added to its sum of digits gives 398715804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1845799 + ... + 1846014.

Almost surely, 2^398715804 is an apocalyptic number.

It is an amenable number.

398715804 is an abundant number, since it is smaller than the sum of its proper divisors (634992116).

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

398715804 is a wasteful number, since it uses less digits than its factorization.

398715804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691826 (or 3691818 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 398715804 is about 19967.8692904376. The cubic root of 398715804 is about 736.0169513070.

Subtracting 398715804 from its reverse (408517893), we obtain a palindrome (9802089).

It can be divided in two parts, 3987 and 15804, that added together give a palindrome (19791).

The spelling of 398715804 in words is "three hundred ninety-eight million, seven hundred fifteen thousand, eight hundred four".