72505722 has 24 divisors (see below), whose sum is σ = 146424096. Its totient is φ = 23934544.

The previous prime is 72505721. The next prime is 72505723. The reversal of 72505722 is 22750527.

It is an interprime number because it is at equal distance from previous prime (72505721) and next prime (72505723).

It is a self number, because there is not a number n which added to its sum of digits gives 72505722.

It is not an unprimeable number, because it can be changed into a prime (72505721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269404 + ... + 269672.

It is an arithmetic number, because the mean of its divisors is an integer number (6101004).

Almost surely, 2^72505722 is an apocalyptic number.

72505722 is an abundant number, since it is smaller than the sum of its proper divisors (73918374).

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

72505722 is a wasteful number, since it uses less digits than its factorization.

72505722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 72505722 is about 8515.0291837433. The cubic root of 72505722 is about 416.9885153460.

The spelling of 72505722 in words is "seventy-two million, five hundred five thousand, seven hundred twenty-two".