72500540 has 24 divisors (see below), whose sum is σ = 174001632. Its totient is φ = 24857280.

The previous prime is 72500521. The next prime is 72500543. The reversal of 72500540 is 4500527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72500543) 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, 258791 + ... + 259070.

It is an arithmetic number, because the mean of its divisors is an integer number (7250068).

Almost surely, 2^72500540 is an apocalyptic number.

72500540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72500540 is an abundant number, since it is smaller than the sum of its proper divisors (101501092).

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

72500540 is a wasteful number, since it uses less digits than its factorization.

72500540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517877 (or 517875 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 72500540 is about 8514.7248927960. The cubic root of 72500540 is about 416.9785810222.

The spelling of 72500540 in words is "seventy-two million, five hundred thousand, five hundred forty".