90845136 has 60 divisors (see below), whose sum is σ = 254881380. Its totient is φ = 30205440.

The previous prime is 90845129. The next prime is 90845141. The reversal of 90845136 is 63154809.

It can be written as a sum of positive squares in 2 ways, for example, as 17640000 + 73205136 = 4200^2 + 8556^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 90845136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109170 + ... + 109998.

It is an arithmetic number, because the mean of its divisors is an integer number (4248023).

Almost surely, 2^90845136 is an apocalyptic number.

It is an amenable number.

90845136 is an abundant number, since it is smaller than the sum of its proper divisors (164036244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90845136 is a wasteful number, since it uses less digits than its factorization.

90845136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604 (or 1595 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 90845136 is about 9531.2714786643. The cubic root of 90845136 is about 449.5388460957.

The spelling of 90845136 in words is "ninety million, eight hundred forty-five thousand, one hundred thirty-six".