90205722 has 24 divisors (see below), whose sum is σ = 201751680. Its totient is φ = 29098440.

The previous prime is 90205721. The next prime is 90205729. The reversal of 90205722 is 22750209.

It is a happy number.

90205722 is a `hidden beast` number, since 90 + 2 + 0 + 572 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (90205721) 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, 80272 + ... + 81387.

It is an arithmetic number, because the mean of its divisors is an integer number (8406320).

Almost surely, 2^90205722 is an apocalyptic number.

90205722 is an abundant number, since it is smaller than the sum of its proper divisors (111545958).

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

90205722 is a wasteful number, since it uses less digits than its factorization.

90205722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161698 (or 161695 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 90205722 is about 9497.6692930424. The cubic root of 90205722 is about 448.4816679867.

The spelling of 90205722 in words is "ninety million, two hundred five thousand, seven hundred twenty-two".