91726420 has 48 divisors (see below), whose sum is σ = 200672640. Its totient is φ = 35176064.

The previous prime is 91726409. The next prime is 91726421. The reversal of 91726420 is 2462719.

It is a super-2 number, since 2×91726420² = 16827472252032800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91726421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96387 + ... + 97333.

It is an arithmetic number, because the mean of its divisors is an integer number (4180680).

Almost surely, 2^91726420 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 91726420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100336320).

91726420 is an abundant number, since it is smaller than the sum of its proper divisors (108946220).

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

91726420 is a wasteful number, since it uses less digits than its factorization.

91726420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 91726420 is about 9577.3910852591. The cubic root of 91726420 is about 450.9878217566.

The spelling of 91726420 in words is "ninety-one million, seven hundred twenty-six thousand, four hundred twenty".