90287808 has 112 divisors (see below), whose sum is σ = 261920736. Its totient is φ = 27279360.

The previous prime is 90287803. The next prime is 90287837. The reversal of 90287808 is 80878209.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90287808.

It is not an unprimeable number, because it can be changed into a prime (90287803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151960 + ... + 152552.

It is an arithmetic number, because the mean of its divisors is an integer number (2338578).

Almost surely, 2^90287808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90287808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130960368).

90287808 is an abundant number, since it is smaller than the sum of its proper divisors (171632928).

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

90287808 is a wasteful number, since it uses less digits than its factorization.

90287808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 90287808 is about 9501.9896863762. The cubic root of 90287808 is about 448.6176641824.

It can be divided in two parts, 9028 and 7808, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 90287808 in words is "ninety million, two hundred eighty-seven thousand, eight hundred eight".