90085810 has 8 divisors (see below), whose sum is σ = 162154476. Its totient is φ = 36034320.

The previous prime is 90085781. The next prime is 90085819. The reversal of 90085810 is 1858009.

It can be written as a sum of positive squares in 2 ways, for example, as 85063729 + 5022081 = 9223^2 + 2241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×90085810² = 16230906326712200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90085819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4504281 + ... + 4504300.

Almost surely, 2^90085810 is an apocalyptic number.

90085810 is a deficient number, since it is larger than the sum of its proper divisors (72068666).

90085810 is a wasteful number, since it uses less digits than its factorization.

90085810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9008588.

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

The square root of 90085810 is about 9491.3544871109. The cubic root of 90085810 is about 448.2828550966.

The spelling of 90085810 in words is "ninety million, eighty-five thousand, eight hundred ten".