91532844 has 72 divisors (see below), whose sum is σ = 251242992. Its totient is φ = 27930240.

The previous prime is 91532827. The next prime is 91532849. The reversal of 91532844 is 44823519.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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 = 91532799 and 91532808.

It is not an unprimeable number, because it can be changed into a prime (91532849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60562 + ... + 62054.

It is an arithmetic number, because the mean of its divisors is an integer number (3489486).

Almost surely, 2^91532844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91532844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125621496).

91532844 is an abundant number, since it is smaller than the sum of its proper divisors (159710148).

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

91532844 is a wasteful number, since it uses less digits than its factorization.

91532844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647 (or 1642 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 91532844 is about 9567.2798642038. The cubic root of 91532844 is about 450.6703490571.

The spelling of 91532844 in words is "ninety-one million, five hundred thirty-two thousand, eight hundred forty-four".