91925540 has 96 divisors (see below), whose sum is σ = 232243200. Its totient is φ = 29900160.

The previous prime is 91925539. The next prime is 91925569. The reversal of 91925540 is 4552919.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 91925540.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 255881 + ... + 256239.

It is an arithmetic number, because the mean of its divisors is an integer number (2419200).

Almost surely, 2^91925540 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 91925540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116121600).

91925540 is an abundant number, since it is smaller than the sum of its proper divisors (140317660).

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

91925540 is a wasteful number, since it uses less digits than its factorization.

91925540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 91925540 is about 9587.7807651197. The cubic root of 91925540 is about 451.3139211634.

The spelling of 91925540 in words is "ninety-one million, nine hundred twenty-five thousand, five hundred forty".