91726020 has 120 divisors (see below), whose sum is σ = 294979608. Its totient is φ = 23846400.

The previous prime is 91726003. The next prime is 91726027. The reversal of 91726020 is 2062719.

It can be written as a sum of positive squares in 4 ways, for example, as 26244 + 91699776 = 162^2 + 9576^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91726027) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 65730 + ... + 67110.

Almost surely, 2^91726020 is an apocalyptic number.

91726020 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91726020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147489804).

91726020 is an abundant number, since it is smaller than the sum of its proper divisors (203253588).

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

91726020 is a wasteful number, since it uses less digits than its factorization.

91726020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443 (or 1432 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 91726020 is about 9577.3702027227. The cubic root of 91726020 is about 450.9871662007.

Adding to 91726020 its reverse (2062719), we get a palindrome (93788739).

The spelling of 91726020 in words is "ninety-one million, seven hundred twenty-six thousand, twenty".