90528985 has 4 divisors (see below), whose sum is σ = 108634788. Its totient is φ = 72423184.

The previous prime is 90528947. The next prime is 90529009. The reversal of 90528985 is 58982509.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66194496 + 24334489 = 8136^2 + 4933^2 .

It is a cyclic number.

It is not a de Polignac number, because 90528985 - 2¹¹ = 90526937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9052894 + ... + 9052903.

It is an arithmetic number, because the mean of its divisors is an integer number (27158697).

Almost surely, 2^90528985 is an apocalyptic number.

It is an amenable number.

90528985 is a deficient number, since it is larger than the sum of its proper divisors (18105803).

90528985 is a wasteful number, since it uses less digits than its factorization.

90528985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18105802.

The product of its (nonzero) digits is 259200, while the sum is 46.

The square root of 90528985 is about 9514.6720910392. The cubic root of 90528985 is about 449.0167585506.

It can be divided in two parts, 905 and 28985, that added together give a triangular number (29890 = T₂₄₄).

The spelling of 90528985 in words is "ninety million, five hundred twenty-eight thousand, nine hundred eighty-five".