90216108 has 18 divisors (see below), whose sum is σ = 228046364. Its totient is φ = 30072024.

The previous prime is 90216083. The next prime is 90216121. The reversal of 90216108 is 80161209.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×90216108² = 16277892285335328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1252966 + ... + 1253037.

Almost surely, 2^90216108 is an apocalyptic number.

It is an amenable number.

90216108 is an abundant number, since it is smaller than the sum of its proper divisors (137830256).

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

90216108 is a wasteful number, since it uses less digits than its factorization.

90216108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506013 (or 2506008 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 90216108 is about 9498.2160430262. The cubic root of 90216108 is about 448.4988795772.

It can be divided in two parts, 9021 and 6108, that added together give a square (15129 = 123²).

The spelling of 90216108 in words is "ninety million, two hundred sixteen thousand, one hundred eight".