91984940 has 24 divisors (see below), whose sum is σ = 194028912. Its totient is φ = 36630080.

The previous prime is 91984931. The next prime is 91985009. The reversal of 91984940 is 4948919.

It is a super-2 number, since 2×91984940² = 16922458373607200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91984891 and 91984900.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5591 + ... + 14670.

It is an arithmetic number, because the mean of its divisors is an integer number (8084538).

Almost surely, 2^91984940 is an apocalyptic number.

It is an amenable number.

91984940 is an abundant number, since it is smaller than the sum of its proper divisors (102043972).

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

91984940 is a wasteful number, since it uses less digits than its factorization.

91984940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20497 (or 20495 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 91984940 is about 9590.8779577263. The cubic root of 91984940 is about 451.4111095137.

The spelling of 91984940 in words is "ninety-one million, nine hundred eighty-four thousand, nine hundred forty".