90785442 has 32 divisors (see below), whose sum is σ = 199655424. Its totient is φ = 27291600.

The previous prime is 90785419. The next prime is 90785459. The reversal of 90785442 is 24458709.

It is a self number, because there is not a number n which added to its sum of digits gives 90785442.

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, 2967 + ... + 13797.

It is an arithmetic number, because the mean of its divisors is an integer number (6239232).

Almost surely, 2^90785442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90785442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99827712).

90785442 is an abundant number, since it is smaller than the sum of its proper divisors (108869982).

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

90785442 is a wasteful number, since it uses less digits than its factorization.

90785442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10974.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 90785442 is about 9528.1394826062. The cubic root of 90785442 is about 449.4403610882.

The spelling of 90785442 in words is "ninety million, seven hundred eighty-five thousand, four hundred forty-two".