91244808 has 48 divisors (see below), whose sum is σ = 247747500. Its totient is φ = 30337920.

The previous prime is 91244779. The next prime is 91244809. The reversal of 91244808 is 80844219.

It can be written as a sum of positive squares in 2 ways, for example, as 82846404 + 8398404 = 9102^2 + 2898^2 .

It is a super-2 number, since 2×91244808² = 16651229973913728, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (91244809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31818 + ... + 34566.

Almost surely, 2^91244808 is an apocalyptic number.

It is an amenable number.

91244808 is an abundant number, since it is smaller than the sum of its proper divisors (156502692).

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

91244808 is a wasteful number, since it uses less digits than its factorization.

91244808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222 (or 3215 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 91244808 is about 9552.2148217050. The cubic root of 91244808 is about 450.1971284475.

The spelling of 91244808 in words is "ninety-one million, two hundred forty-four thousand, eight hundred eight".