90220212 has 36 divisors (see below), whose sum is σ = 230950720. Its totient is φ = 29691792.

The previous prime is 90220211. The next prime is 90220219. The reversal of 90220212 is 21202209.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90220211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13018 + ... + 18705.

Almost surely, 2^90220212 is an apocalyptic number.

It is an amenable number.

90220212 is an abundant number, since it is smaller than the sum of its proper divisors (140730508).

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

90220212 is a wasteful number, since it uses less digits than its factorization.

90220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31812 (or 31807 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 90220212 is about 9498.4320811384. The cubic root of 90220212 is about 448.5056803269.

The spelling of 90220212 in words is "ninety million, two hundred twenty thousand, two hundred twelve".