91674540 has 72 divisors (see below), whose sum is σ = 294446880. Its totient is φ = 23007744.

The previous prime is 91674511. The next prime is 91674547. The reversal of 91674540 is 4547619.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 91674495 and 91674504.

It is not an unprimeable number, because it can be changed into a prime (91674547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11920 + ... + 18039.

It is an arithmetic number, because the mean of its divisors is an integer number (4089540).

Almost surely, 2^91674540 is an apocalyptic number.

91674540 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

91674540 is an abundant number, since it is smaller than the sum of its proper divisors (202772340).

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

91674540 is a wasteful number, since it uses less digits than its factorization.

91674540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29991 (or 29986 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 91674540 is about 9574.6822401582. The cubic root of 91674540 is about 450.9027802433.

The spelling of 91674540 in words is "ninety-one million, six hundred seventy-four thousand, five hundred forty".