91072576 has 84 divisors (see below), whose sum is σ = 212913468. Its totient is φ = 38535168.

The previous prime is 91072523. The next prime is 91072601. The reversal of 91072576 is 67527019.

It can be written as a sum of positive squares in 2 ways, for example, as 45914176 + 45158400 = 6776^2 + 6720^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354240 + ... + 354496.

Almost surely, 2^91072576 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 91072576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106456734).

91072576 is an abundant number, since it is smaller than the sum of its proper divisors (121840892).

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

91072576 is a wasteful number, since it uses less digits than its factorization.

91072576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 91072576 is about 9543.1952720250. The cubic root of 91072576 is about 449.9136887961.

The spelling of 91072576 in words is "ninety-one million, seventy-two thousand, five hundred seventy-six".