28218218190 has 32 divisors (see below), whose sum is σ = 67747950720. Its totient is φ = 7522166304.

The previous prime is 28218218177. The next prime is 28218218209. The reversal of 28218218190 is 9181281282.

It is a super-2 number, since 2×28218218190² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82264 + ... + 251403.

It is an arithmetic number, because the mean of its divisors is an integer number (2117123460).

Almost surely, 2^28218218190 is an apocalyptic number.

28218218190 is an abundant number, since it is smaller than the sum of its proper divisors (39529732530).

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

28218218190 is a wasteful number, since it uses less digits than its factorization.

28218218190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336496.

The product of its (nonzero) digits is 36864, while the sum is 42.

The spelling of 28218218190 in words is "twenty-eight billion, two hundred eighteen million, two hundred eighteen thousand, one hundred ninety".