91260988 has 48 divisors (see below), whose sum is σ = 197364160. Its totient is φ = 35956224.

The previous prime is 91260979. The next prime is 91260997. The reversal of 91260988 is 88906219.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91260979) and next prime (91260997).

It is a super-2 number, since 2×91260988² = 16657135861472288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148570 + ... + 149182.

Almost surely, 2^91260988 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 91260988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98682080).

91260988 is an abundant number, since it is smaller than the sum of its proper divisors (106103172).

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

91260988 is a wasteful number, since it uses less digits than its factorization.

91260988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 91260988 is about 9553.0617081646. The cubic root of 91260988 is about 450.2237373004.

The spelling of 91260988 in words is "ninety-one million, two hundred sixty thousand, nine hundred eighty-eight".