90162228 has 48 divisors (see below), whose sum is σ = 231847616. Its totient is φ = 27095040.

The previous prime is 90162223. The next prime is 90162257. The reversal of 90162228 is 82226109.

It is a junction number, because it is equal to n+sod(n) for n = 90162195 and 90162204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90162221) 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, 13 + ... + 13428.

Almost surely, 2^90162228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90162228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115923808).

90162228 is an abundant number, since it is smaller than the sum of its proper divisors (141685388).

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

90162228 is a wasteful number, since it uses less digits than its factorization.

90162228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13504 (or 13502 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 90162228 is about 9495.3792973214. The cubic root of 90162228 is about 448.4095757471.

The spelling of 90162228 in words is "ninety million, one hundred sixty-two thousand, two hundred twenty-eight".