398087772 has 48 divisors (see below), whose sum is σ = 1020284160. Its totient is φ = 120244608.

The previous prime is 398087747. The next prime is 398087797. The reversal of 398087772 is 277780893.

It is an interprime number because it is at equal distance from previous prime (398087747) and next prime (398087797).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32713 + ... + 43200.

It is an arithmetic number, because the mean of its divisors is an integer number (21255920).

Almost surely, 2^398087772 is an apocalyptic number.

It is an amenable number.

398087772 is an abundant number, since it is smaller than the sum of its proper divisors (622196388).

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

398087772 is a wasteful number, since it uses less digits than its factorization.

398087772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75962 (or 75960 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 51.

The square root of 398087772 is about 19952.1370283987. The cubic root of 398087772 is about 735.6303057278.

The spelling of 398087772 in words is "three hundred ninety-eight million, eighty-seven thousand, seven hundred seventy-two".