90561292 has 48 divisors (see below), whose sum is σ = 171601920. Its totient is φ = 41731200.

The previous prime is 90561257. The next prime is 90561299. The reversal of 90561292 is 29216509.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (90561299) 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, 238759 + ... + 239137.

It is an arithmetic number, because the mean of its divisors is an integer number (3575040).

Almost surely, 2^90561292 is an apocalyptic number.

It is an amenable number.

90561292 is a deficient number, since it is larger than the sum of its proper divisors (81040628).

90561292 is a wasteful number, since it uses less digits than its factorization.

90561292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 90561292 is about 9516.3696859674. The cubic root of 90561292 is about 449.0701656045.

The spelling of 90561292 in words is "ninety million, five hundred sixty-one thousand, two hundred ninety-two".