90036261 has 24 divisors (see below), whose sum is σ = 148921344. Its totient is φ = 51348960.

The previous prime is 90036251. The next prime is 90036299. The reversal of 90036261 is 16263009.

It is a happy number.

It is not a de Polignac number, because 90036261 - 2⁶ = 90036197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90036211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41596 + ... + 43706.

It is an arithmetic number, because the mean of its divisors is an integer number (6205056).

Almost surely, 2^90036261 is an apocalyptic number.

It is an amenable number.

90036261 is a deficient number, since it is larger than the sum of its proper divisors (58885083).

90036261 is a wasteful number, since it uses less digits than its factorization.

90036261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801 (or 2798 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 90036261 is about 9488.7439105500. The cubic root of 90036261 is about 448.2006518404.

The spelling of 90036261 in words is "ninety million, thirty-six thousand, two hundred sixty-one".