91018032 has 80 divisors (see below), whose sum is σ = 275315712. Its totient is φ = 25367040.

The previous prime is 91018009. The next prime is 91018043. The reversal of 91018032 is 23081019.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 91017993 and 91018011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10473 + ... + 17079.

Almost surely, 2^91018032 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 91018032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137657856).

91018032 is an abundant number, since it is smaller than the sum of its proper divisors (184297680).

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

91018032 is a wasteful number, since it uses less digits than its factorization.

91018032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6666 (or 6660 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 91018032 is about 9540.3371009624. The cubic root of 91018032 is about 449.8238520453.

The spelling of 91018032 in words is "ninety-one million, eighteen thousand, thirty-two".