389998216 has 8 divisors (see below), whose sum is σ = 731246670. Its totient is φ = 194999104.

The previous prime is 389998211. The next prime is 389998247. The reversal of 389998216 is 612899983.

It can be written as a sum of positive squares in only one way, i.e., 267453316 + 122544900 = 16354^2 + 11070^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (389998211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24374881 + ... + 24374896.

Almost surely, 2^389998216 is an apocalyptic number.

It is an amenable number.

389998216 is a deficient number, since it is larger than the sum of its proper divisors (341248454).

389998216 is a wasteful number, since it uses less digits than its factorization.

389998216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48749783 (or 48749779 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 55.

The square root of 389998216 is about 19748.3724899041. The cubic root of 389998216 is about 730.6132433738.

The spelling of 389998216 in words is "three hundred eighty-nine million, nine hundred ninety-eight thousand, two hundred sixteen".