90811488 has 48 divisors (see below), whose sum is σ = 250931520. Its totient is φ = 28676736.

The previous prime is 90811481. The next prime is 90811529. The reversal of 90811488 is 88411809.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90811481) 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, 23070 + ... + 26717.

It is an arithmetic number, because the mean of its divisors is an integer number (5227740).

Almost surely, 2^90811488 is an apocalyptic number.

It is an amenable number.

90811488 is an abundant number, since it is smaller than the sum of its proper divisors (160120032).

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

90811488 is a wasteful number, since it uses less digits than its factorization.

90811488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49819 (or 49811 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 90811488 is about 9529.5061781815. The cubic root of 90811488 is about 449.4833378918.

The spelling of 90811488 in words is "ninety million, eight hundred eleven thousand, four hundred eighty-eight".