91074560 has 52 divisors (see below), whose sum is σ = 218601408. Its totient is φ = 36421632.

The previous prime is 91074551. The next prime is 91074569. The reversal of 91074560 is 6547019.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91074551) and next prime (91074569).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (91074569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18257 + ... + 22703.

Almost surely, 2^91074560 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 91074560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109300704).

91074560 is an abundant number, since it is smaller than the sum of its proper divisors (127526848).

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

91074560 is an equidigital number, since it uses as much as digits as its factorization.

91074560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4476 (or 4454 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 91074560 is about 9543.2992198715. The cubic root of 91074560 is about 449.9169558692.

The spelling of 91074560 in words is "ninety-one million, seventy-four thousand, five hundred sixty".