90045534 has 16 divisors (see below), whose sum is σ = 180311040. Its totient is φ = 29978520.

The previous prime is 90045533. The next prime is 90045547. The reversal of 90045534 is 43554009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90045533) 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, 3582 + ... + 13889.

It is an arithmetic number, because the mean of its divisors is an integer number (11269440).

Almost surely, 2^90045534 is an apocalyptic number.

90045534 is an abundant number, since it is smaller than the sum of its proper divisors (90265506).

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

90045534 is a wasteful number, since it uses less digits than its factorization.

90045534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18335.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 90045534 is about 9489.2325295569. The cubic root of 90045534 is about 448.2160383151.

The spelling of 90045534 in words is "ninety million, forty-five thousand, five hundred thirty-four".