72730942 has 4 divisors (see below), whose sum is σ = 109096416. Its totient is φ = 36365470.

The previous prime is 72730939. The next prime is 72730951. The reversal of 72730942 is 24903727.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 72730898 and 72730907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18182734 + ... + 18182737.

It is an arithmetic number, because the mean of its divisors is an integer number (27274104).

Almost surely, 2^72730942 is an apocalyptic number.

72730942 is a deficient number, since it is larger than the sum of its proper divisors (36365474).

72730942 is a wasteful number, since it uses less digits than its factorization.

72730942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36365473.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 72730942 is about 8528.2437816939. The cubic root of 72730942 is about 417.4198242064.

The spelling of 72730942 in words is "seventy-two million, seven hundred thirty thousand, nine hundred forty-two".