91801038 has 16 divisors (see below), whose sum is σ = 209831040. Its totient is φ = 26228856.

The previous prime is 91801019. The next prime is 91801043. The reversal of 91801038 is 83010819.

It is a junction number, because it is equal to n+sod(n) for n = 91800996 and 91801014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1092828 + ... + 1092911.

It is an arithmetic number, because the mean of its divisors is an integer number (13114440).

Almost surely, 2^91801038 is an apocalyptic number.

91801038 is an abundant number, since it is smaller than the sum of its proper divisors (118030002).

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

91801038 is a wasteful number, since it uses less digits than its factorization.

91801038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185751.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 91801038 is about 9581.2858218508. The cubic root of 91801038 is about 451.1100791111.

The spelling of 91801038 in words is "ninety-one million, eight hundred one thousand, thirty-eight".