91145844 has 48 divisors (see below), whose sum is σ = 237160000. Its totient is φ = 30271968.

The previous prime is 91145827. The next prime is 91145861. The reversal of 91145844 is 44854119.

It is an interprime number because it is at equal distance from previous prime (91145827) and next prime (91145861).

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

It is a junction number, because it is equal to n+sod(n) for n = 91145799 and 91145808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31782 + ... + 34530.

Almost surely, 2^91145844 is an apocalyptic number.

It is an amenable number.

91145844 is an abundant number, since it is smaller than the sum of its proper divisors (146014156).

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

91145844 is a wasteful number, since it uses less digits than its factorization.

91145844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069 (or 3061 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 91145844 is about 9547.0332564624. The cubic root of 91145844 is about 450.0343084953.

The spelling of 91145844 in words is "ninety-one million, one hundred forty-five thousand, eight hundred forty-four".