74540 has 12 divisors (see below), whose sum is σ = 156576. Its totient is φ = 29808.

The previous prime is 74531. The next prime is 74551. The reversal of 74540 is 4547.

74540 = 93² + 94² + ... + 100².

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 3727 = 74540 / (7 + 4 + 5 + 4 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1844 + ... + 1883.

It is an arithmetic number, because the mean of its divisors is an integer number (13048).

2⁷⁴⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

74540 is an abundant number, since it is smaller than the sum of its proper divisors (82036).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78288).

74540 is a wasteful number, since it uses less digits than its factorization.

74540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736 (or 3734 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 74540 is about 273.0201457768. The cubic root of 74540 is about 42.0852388337.

The spelling of 74540 in words is "seventy-four thousand, five hundred forty".