91993360 has 20 divisors (see below), whose sum is σ = 213884748. Its totient is φ = 36797312.

The previous prime is 91993333. The next prime is 91993361. The reversal of 91993360 is 6339919.

It can be written as a sum of positive squares in 2 ways, for example, as 46457856 + 45535504 = 6816^2 + 6748^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (91993361) 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, 574879 + ... + 575038.

Almost surely, 2^91993360 is an apocalyptic number.

It is an amenable number.

91993360 is an abundant number, since it is smaller than the sum of its proper divisors (121891388).

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

91993360 is a wasteful number, since it uses less digits than its factorization.

91993360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149930 (or 1149924 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 91993360 is about 9591.3169064524. The cubic root of 91993360 is about 451.4248826581.

The spelling of 91993360 in words is "ninety-one million, nine hundred ninety-three thousand, three hundred sixty".