398216234 has 16 divisors (see below), whose sum is σ = 649908168. Its totient is φ = 181896192.

The previous prime is 398216201. The next prime is 398216251. The reversal of 398216234 is 432612893.

It can be written as a sum of positive squares in 4 ways, for example, as 209236225 + 188980009 = 14465^2 + 13747^2 .

It is a super-2 number, since 2×398216234² = 317152338042285512, which contains 22 as substring.

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, 76427 + ... + 81470.

Almost surely, 2^398216234 is an apocalyptic number.

398216234 is a deficient number, since it is larger than the sum of its proper divisors (251691934).

398216234 is a wasteful number, since it uses less digits than its factorization.

398216234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158009.

The product of its digits is 62208, while the sum is 38.

The square root of 398216234 is about 19955.3560228827. The cubic root of 398216234 is about 735.7094259485.

The spelling of 398216234 in words is "three hundred ninety-eight million, two hundred sixteen thousand, two hundred thirty-four".