90573290 has 32 divisors (see below), whose sum is σ = 168455376. Its totient is φ = 35043840.

The previous prime is 90573283. The next prime is 90573317. The reversal of 90573290 is 9237509.

It is a Cunningham number, because it is equal to 9517²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 59089969 + 31483321 = 7687^2 + 5611^2 .

It is a super-2 number, since 2×90573290² = 16407041722848200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 90573290.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 37520 + ... + 39860.

Almost surely, 2^90573290 is an apocalyptic number.

90573290 is a deficient number, since it is larger than the sum of its proper divisors (77882086).

90573290 is a wasteful number, since it uses less digits than its factorization.

90573290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 90573290 is about 9517.0000525376. Note that the first 4 decimals coincide. The cubic root of 90573290 is about 449.0899963946.

The spelling of 90573290 in words is "ninety million, five hundred seventy-three thousand, two hundred ninety".