91295028 has 72 divisors (see below), whose sum is σ = 257939136. Its totient is φ = 26985600.

The previous prime is 91295023. The next prime is 91295033. The reversal of 91295028 is 82059219.

It is an interprime number because it is at equal distance from previous prime (91295023) and next prime (91295033).

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 = 91294983 and 91295001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91295023) 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, 13425 + ... + 19047.

It is an arithmetic number, because the mean of its divisors is an integer number (3582488).

Almost surely, 2^91295028 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 91295028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128969568).

91295028 is an abundant number, since it is smaller than the sum of its proper divisors (166644108).

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

91295028 is a wasteful number, since it uses less digits than its factorization.

91295028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5685 (or 5680 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 91295028 is about 9554.8431698275. The cubic root of 91295028 is about 450.2797075869.

The spelling of 91295028 in words is "ninety-one million, two hundred ninety-five thousand, twenty-eight".