73028540 has 24 divisors (see below), whose sum is σ = 165157440. Its totient is φ = 26964288.

The previous prime is 73028513. The next prime is 73028561. The reversal of 73028540 is 4582037.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140180 + ... + 140699.

It is an arithmetic number, because the mean of its divisors is an integer number (6881560).

Almost surely, 2^73028540 is an apocalyptic number.

It is an amenable number.

73028540 is an abundant number, since it is smaller than the sum of its proper divisors (92128900).

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

73028540 is a wasteful number, since it uses less digits than its factorization.

73028540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280901 (or 280899 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 73028540 is about 8545.6737592773. The cubic root of 73028540 is about 417.9883775375.

The spelling of 73028540 in words is "seventy-three million, twenty-eight thousand, five hundred forty".