90800518 has 4 divisors (see below), whose sum is σ = 136200780. Its totient is φ = 45400258.

The previous prime is 90800503. The next prime is 90800543. The reversal of 90800518 is 81500809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81500809 = 13 ⋅6269293.

It is a Smith number, since the sum of its digits (31) 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 90800518.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22700128 + ... + 22700131.

It is an arithmetic number, because the mean of its divisors is an integer number (34050195).

Almost surely, 2^90800518 is an apocalyptic number.

90800518 is a deficient number, since it is larger than the sum of its proper divisors (45400262).

90800518 is a wasteful number, since it uses less digits than its factorization.

90800518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45400261.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 90800518 is about 9528.9305800809. The cubic root of 90800518 is about 449.4652380130.

The spelling of 90800518 in words is "ninety million, eight hundred thousand, five hundred eighteen".