91984074 has 96 divisors (see below), whose sum is σ = 236488896. Its totient is φ = 23627520.

The previous prime is 91984031. The next prime is 91984091. The reversal of 91984074 is 47048919.

It is a super-2 number, since 2×91984074² = 16922139739274952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156409 + ... + 156995.

It is an arithmetic number, because the mean of its divisors is an integer number (2463426).

Almost surely, 2^91984074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91984074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118244448).

91984074 is an abundant number, since it is smaller than the sum of its proper divisors (144504822).

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

91984074 is a wasteful number, since it uses less digits than its factorization.

91984074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 91984074 is about 9590.8328105540. The cubic root of 91984074 is about 451.4096928932.

The spelling of 91984074 in words is "ninety-one million, nine hundred eighty-four thousand, seventy-four".