72730575 has 96 divisors (see below), whose sum is σ = 144633600. Its totient is φ = 35717760.

The previous prime is 72730571. The next prime is 72730583. The reversal of 72730575 is 57503727.

It is not a de Polignac number, because 72730575 - 2² = 72730571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72730571) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 679672 + ... + 679778.

It is an arithmetic number, because the mean of its divisors is an integer number (1506600).

Almost surely, 2^72730575 is an apocalyptic number.

72730575 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

72730575 is a deficient number, since it is larger than the sum of its proper divisors (71903025).

72730575 is a wasteful number, since it uses less digits than its factorization.

72730575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 51450, while the sum is 36.

The square root of 72730575 is about 8528.2222649272. Note that the first 4 decimals coincide. The cubic root of 72730575 is about 417.4191221057.

The spelling of 72730575 in words is "seventy-two million, seven hundred thirty thousand, five hundred seventy-five".