90212766 has 16 divisors (see below), whose sum is σ = 206200704. Its totient is φ = 25775064.

The previous prime is 90212737. The next prime is 90212767. The reversal of 90212766 is 66721209.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90212767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1073920 + ... + 1074003.

It is an arithmetic number, because the mean of its divisors is an integer number (12887544).

Almost surely, 2^90212766 is an apocalyptic number.

90212766 is an abundant number, since it is smaller than the sum of its proper divisors (115987938).

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

90212766 is a wasteful number, since it uses less digits than its factorization.

90212766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147935.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 90212766 is about 9498.0401136234. The cubic root of 90212766 is about 448.4933413875.

The spelling of 90212766 in words is "ninety million, two hundred twelve thousand, seven hundred sixty-six".