72730330 has 8 divisors (see below), whose sum is σ = 130914612. Its totient is φ = 29092128.

The previous prime is 72730277. The next prime is 72730331. The reversal of 72730330 is 3303727.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65173329 + 7557001 = 8073^2 + 2749^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 72730295 and 72730304.

It is not an unprimeable number, because it can be changed into a prime (72730331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3636507 + ... + 3636526.

Almost surely, 2^72730330 is an apocalyptic number.

72730330 is a deficient number, since it is larger than the sum of its proper divisors (58184282).

72730330 is a wasteful number, since it uses less digits than its factorization.

72730330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7273040.

The product of its (nonzero) digits is 2646, while the sum is 25.

The square root of 72730330 is about 8528.2079008429. The cubic root of 72730330 is about 417.4186533996.

The spelling of 72730330 in words is "seventy-two million, seven hundred thirty thousand, three hundred thirty".