91941440 has 56 divisors (see below), whose sum is σ = 231827832. Its totient is φ = 34611200.

The previous prime is 91941427. The next prime is 91941449. The reversal of 91941440 is 4414919.

It can be written as a sum of positive squares in 4 ways, for example, as 52301824 + 39639616 = 7232^2 + 6296^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 91941397 and 91941406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91941449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3011 + ... + 13890.

Almost surely, 2^91941440 is an apocalyptic number.

It is an amenable number.

91941440 is an abundant number, since it is smaller than the sum of its proper divisors (139886392).

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

91941440 is a wasteful number, since it uses less digits than its factorization.

91941440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16935 (or 16925 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 91941440 is about 9588.6099096793. The cubic root of 91941440 is about 451.3399403294.

The spelling of 91941440 in words is "ninety-one million, nine hundred forty-one thousand, four hundred forty".