91827440 has 20 divisors (see below), whose sum is σ = 213498984. Its totient is φ = 36730944.

The previous prime is 91827433. The next prime is 91827443. The reversal of 91827440 is 4472819.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 91827440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91827443) 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, 573842 + ... + 574001.

Almost surely, 2^91827440 is an apocalyptic number.

It is an amenable number.

91827440 is an abundant number, since it is smaller than the sum of its proper divisors (121671544).

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

91827440 is a wasteful number, since it uses less digits than its factorization.

91827440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147856 (or 1147850 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 91827440 is about 9582.6635128236. The cubic root of 91827440 is about 451.1533214206.

The spelling of 91827440 in words is "ninety-one million, eight hundred twenty-seven thousand, four hundred forty".