90789285 has 32 divisors (see below), whose sum is σ = 151683840. Its totient is φ = 46312448.

The previous prime is 90789269. The next prime is 90789287. The reversal of 90789285 is 58298709.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 90789285 - 2⁴ = 90789269 is a prime.

It is a super-2 number, since 2×90789285² = 16485388541622450, which contains 22 as substring.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90789287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48232 + ... + 50078.

It is an arithmetic number, because the mean of its divisors is an integer number (4740120).

Almost surely, 2^90789285 is an apocalyptic number.

It is an amenable number.

90789285 is a deficient number, since it is larger than the sum of its proper divisors (60894555).

90789285 is a wasteful number, since it uses less digits than its factorization.

90789285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 90789285 is about 9528.3411462856. The cubic root of 90789285 is about 449.4467026884.

The spelling of 90789285 in words is "ninety million, seven hundred eighty-nine thousand, two hundred eighty-five".