90825784 has 64 divisors (see below), whose sum is σ = 203120640. Its totient is φ = 37255680.

The previous prime is 90825743. The next prime is 90825793. The reversal of 90825784 is 48752809.

It is a self number, because there is not a number n which added to its sum of digits gives 90825784.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195937 + ... + 196399.

It is an arithmetic number, because the mean of its divisors is an integer number (3173760).

Almost surely, 2^90825784 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 90825784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101560320).

90825784 is an abundant number, since it is smaller than the sum of its proper divisors (112294856).

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

90825784 is a wasteful number, since it uses less digits than its factorization.

90825784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 90825784 is about 9530.2562399969. The cubic root of 90825784 is about 449.5069232948.

The spelling of 90825784 in words is "ninety million, eight hundred twenty-five thousand, seven hundred eighty-four".