90212772 has 48 divisors (see below), whose sum is σ = 227360000. Its totient is φ = 27675648.

The previous prime is 90212767. The next prime is 90212777. The reversal of 90212772 is 27721209.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (90212767) and next prime (90212777).

It is not an unprimeable number, because it can be changed into a prime (90212777) 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, 71604 + ... + 72852.

Almost surely, 2^90212772 is an apocalyptic number.

It is an amenable number.

90212772 is an abundant number, since it is smaller than the sum of its proper divisors (137147228).

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

90212772 is a wasteful number, since it uses less digits than its factorization.

90212772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 90212772 is about 9498.0404294781. The cubic root of 90212772 is about 448.4933513305.

The spelling of 90212772 in words is "ninety million, two hundred twelve thousand, seven hundred seventy-two".