73540 has 12 divisors (see below), whose sum is σ = 154476. Its totient is φ = 29408.

The previous prime is 73529. The next prime is 73547. The reversal of 73540 is 4537.

It can be written as a sum of positive squares in 2 ways, for example, as 43264 + 30276 = 208^2 + 174^2 .

It is not an unprimeable number, because it can be changed into a prime (73547) 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, 1819 + ... + 1858.

It is an arithmetic number, because the mean of its divisors is an integer number (12873).

2⁷³⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

73540 is an abundant number, since it is smaller than the sum of its proper divisors (80936).

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 (77238).

73540 is a wasteful number, since it uses less digits than its factorization.

73540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686 (or 3684 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 73540 is about 271.1825953117. The cubic root of 73540 is about 41.8961911010.

The spelling of 73540 in words is "seventy-three thousand, five hundred forty".