91493040 has 40 divisors (see below), whose sum is σ = 283629168. Its totient is φ = 24398080.

The previous prime is 91493029. The next prime is 91493047. The reversal of 91493040 is 4039419.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 91492989 and 91493007.

It is not an unprimeable number, because it can be changed into a prime (91493047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190371 + ... + 190850.

Almost surely, 2^91493040 is an apocalyptic number.

It is an amenable number.

91493040 is an abundant number, since it is smaller than the sum of its proper divisors (192136128).

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

91493040 is a wasteful number, since it uses less digits than its factorization.

91493040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381237 (or 381231 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 91493040 is about 9565.1994229080. The cubic root of 91493040 is about 450.6050133711.

The spelling of 91493040 in words is "ninety-one million, four hundred ninety-three thousand, forty".