90403785 has 12 divisors (see below), whose sum is σ = 156699972. Its totient is φ = 48215328.

The previous prime is 90403763. The next prime is 90403799. The reversal of 90403785 is 58730409.

It can be written as a sum of positive squares in 2 ways, for example, as 31236921 + 59166864 = 5589^2 + 7692^2 .

It is not a de Polignac number, because 90403785 - 2⁶ = 90403721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1004442 + ... + 1004531.

It is an arithmetic number, because the mean of its divisors is an integer number (13058331).

Almost surely, 2^90403785 is an apocalyptic number.

It is an amenable number.

90403785 is a deficient number, since it is larger than the sum of its proper divisors (66296187).

90403785 is a wasteful number, since it uses less digits than its factorization.

90403785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008984 (or 2008981 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 90403785 is about 9508.0905023038. The cubic root of 90403785 is about 448.8096689510.

The spelling of 90403785 in words is "ninety million, four hundred three thousand, seven hundred eighty-five".