398737438 has 16 divisors (see below), whose sum is σ = 673528320. Its totient is φ = 175397400.

The previous prime is 398737403. The next prime is 398737447. The reversal of 398737438 is 834737893.

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, 291648 + ... + 293011.

It is an arithmetic number, because the mean of its divisors is an integer number (42095520).

Almost surely, 2^398737438 is an apocalyptic number.

398737438 is a deficient number, since it is larger than the sum of its proper divisors (274790882).

398737438 is a wasteful number, since it uses less digits than its factorization.

398737438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584703.

The product of its digits is 3048192, while the sum is 52.

The square root of 398737438 is about 19968.4110033823. The cubic root of 398737438 is about 736.0302629629.

The spelling of 398737438 in words is "three hundred ninety-eight million, seven hundred thirty-seven thousand, four hundred thirty-eight".