90811140 has 48 divisors (see below), whose sum is σ = 290596992. Its totient is φ = 20756736.

The previous prime is 90811129. The next prime is 90811163. The reversal of 90811140 is 4111809.

It is a self number, because there is not a number n which added to its sum of digits gives 90811140.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107689 + ... + 108528.

It is an arithmetic number, because the mean of its divisors is an integer number (6054104).

Almost surely, 2^90811140 is an apocalyptic number.

It is an amenable number.

90811140 is an abundant number, since it is smaller than the sum of its proper divisors (199785852).

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

90811140 is a wasteful number, since it uses less digits than its factorization.

90811140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216236 (or 216234 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 90811140 is about 9529.4879190857. The cubic root of 90811140 is about 449.4827637339.

Adding to 90811140 its reverse (4111809), we get a palindrome (94922949).

It can be divided in two parts, 90811 and 140, that added together give a triangular number (90951 = T₄₂₆).

The spelling of 90811140 in words is "ninety million, eight hundred eleven thousand, one hundred forty".