90505058 has 30 divisors (see below), whose sum is σ = 163186155. Its totient is φ = 37536660.

The previous prime is 90505031. The next prime is 90505073. The reversal of 90505058 is 85050509.

It can be written as a sum of positive squares in only one way, i.e., 45252529 + 45252529 = 6727^2 + 6727^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6727.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2919503 + ... + 2919533.

Almost surely, 2^90505058 is an apocalyptic number.

90505058 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

90505058 is a deficient number, since it is larger than the sum of its proper divisors (72681097).

90505058 is an frugal number, since it uses more digits than its factorization.

90505058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 90505058 is about 9513.4146340838. The cubic root of 90505058 is about 448.9771963756.

Multiplying 90505058 by its sum of digits (32), we get a square (2896161856 = 53816²).

The spelling of 90505058 in words is "ninety million, five hundred five thousand, fifty-eight".