73500640 has 48 divisors (see below), whose sum is σ = 181204128. Its totient is φ = 28120576.

The previous prime is 73500619. The next prime is 73500641. The reversal of 73500640 is 4600537.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73500641) 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, 6307 + ... + 13666.

It is an arithmetic number, because the mean of its divisors is an integer number (3775086).

Almost surely, 2^73500640 is an apocalyptic number.

It is an amenable number.

73500640 is an abundant number, since it is smaller than the sum of its proper divisors (107703488).

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

73500640 is a wasteful number, since it uses less digits than its factorization.

73500640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20011 (or 20003 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 73500640 is about 8573.2514252179. The cubic root of 73500640 is about 418.8871522225.

The spelling of 73500640 in words is "seventy-three million, five hundred thousand, six hundred forty".