91358442 has 120 divisors (see below), whose sum is σ = 252512964. Its totient is φ = 24530688.

The previous prime is 91358431. The next prime is 91358489. The reversal of 91358442 is 24485319.

It can be written as a sum of positive squares in 2 ways, for example, as 70207641 + 21150801 = 8379^2 + 4599^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91358397 and 91358406.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 134608 + ... + 135284.

Almost surely, 2^91358442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91358442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126256482).

91358442 is an abundant number, since it is smaller than the sum of its proper divisors (161154522).

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

91358442 is a wasteful number, since it uses less digits than its factorization.

91358442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 706 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 91358442 is about 9558.1610155929. The cubic root of 91358442 is about 450.3839389976.

The spelling of 91358442 in words is "ninety-one million, three hundred fifty-eight thousand, four hundred forty-two".