398231736 has 32 divisors (see below), whose sum is σ = 1137805440. Its totient is φ = 113780448.

The previous prime is 398231699. The next prime is 398231767. The reversal of 398231736 is 637132893.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 1185046 + ... + 1185381.

It is an arithmetic number, because the mean of its divisors is an integer number (35556420).

Almost surely, 2^398231736 is an apocalyptic number.

It is an amenable number.

398231736 is an abundant number, since it is smaller than the sum of its proper divisors (739573704).

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

398231736 is a wasteful number, since it uses less digits than its factorization.

398231736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370443 (or 2370439 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 398231736 is about 19955.7444361267. The cubic root of 398231736 is about 735.7189725370.

The spelling of 398231736 in words is "three hundred ninety-eight million, two hundred thirty-one thousand, seven hundred thirty-six".