90764388 has 144 divisors (see below), whose sum is σ = 279953856. Its totient is φ = 25349760.

The previous prime is 90764381. The next prime is 90764389. The reversal of 90764388 is 88346709.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (90764381) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 138670 + ... + 139322.

It is an arithmetic number, because the mean of its divisors is an integer number (1944124).

Almost surely, 2^90764388 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 90764388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139976928).

90764388 is an abundant number, since it is smaller than the sum of its proper divisors (189189468).

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

90764388 is a wasteful number, since it uses less digits than its factorization.

90764388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 90764388 is about 9527.0345858509. The cubic root of 90764388 is about 449.4056152496.

The spelling of 90764388 in words is "ninety million, seven hundred sixty-four thousand, three hundred eighty-eight".