38890216 has 8 divisors (see below), whose sum is σ = 72919170. Its totient is φ = 19445104.

The previous prime is 38890211. The next prime is 38890223. The reversal of 38890216 is 61209883.

It can be written as a sum of positive squares in only one way, i.e., 37576900 + 1313316 = 6130^2 + 1146^2 .

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 (37) 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 (38890211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2430631 + ... + 2430646.

Almost surely, 2^38890216 is an apocalyptic number.

It is an amenable number.

38890216 is a deficient number, since it is larger than the sum of its proper divisors (34028954).

38890216 is a wasteful number, since it uses less digits than its factorization.

38890216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4861283 (or 4861279 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 38890216 is about 6236.2020493246. The cubic root of 38890216 is about 338.8026394780.

The spelling of 38890216 in words is "thirty-eight million, eight hundred ninety thousand, two hundred sixteen".