90567640 has 16 divisors (see below), whose sum is σ = 203777280. Its totient is φ = 36227040.

The previous prime is 90567613. The next prime is 90567649. The reversal of 90567640 is 4676509.

It is a self number, because there is not a number n which added to its sum of digits gives 90567640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90567649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1132056 + ... + 1132135.

It is an arithmetic number, because the mean of its divisors is an integer number (12736080).

Almost surely, 2^90567640 is an apocalyptic number.

It is an amenable number.

90567640 is an abundant number, since it is smaller than the sum of its proper divisors (113209640).

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

90567640 is a wasteful number, since it uses less digits than its factorization.

90567640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2264202 (or 2264198 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 90567640 is about 9516.7032106712. The cubic root of 90567640 is about 449.0806580593.

The spelling of 90567640 in words is "ninety million, five hundred sixty-seven thousand, six hundred forty".