216090936 has 64 divisors (see below), whose sum is σ = 601459200. Its totient is φ = 71885664.

The previous prime is 216090923. The next prime is 216090937. The reversal of 216090936 is 639090612.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 216090936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216090937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195361 + ... + 196463.

It is an arithmetic number, because the mean of its divisors is an integer number (9397800).

Almost surely, 2^216090936 is an apocalyptic number.

It is an amenable number.

216090936 is an abundant number, since it is smaller than the sum of its proper divisors (385368264).

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

216090936 is a wasteful number, since it uses less digits than its factorization.

216090936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025 (or 2015 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 216090936 is about 14700.0318367002. The cubic root of 216090936 is about 600.0841881867.

It can be divided in two parts, 2160 and 90936, that added together give a triangular number (93096 = T₄₃₁).

The spelling of 216090936 in words is "two hundred sixteen million, ninety thousand, nine hundred thirty-six".