72830645 has 8 divisors (see below), whose sum is σ = 88829880. Its totient is φ = 57309120.

The previous prime is 72830623. The next prime is 72830663. The reversal of 72830645 is 54603827.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1495729 + 71334916 = 1223^2 + 8446^2 .

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

It is not a de Polignac number, because 72830645 - 2⁸ = 72830389 is a prime.

It is a super-2 number, since 2×72830645² = 10608605702232050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119090 + ... + 119699.

It is an arithmetic number, because the mean of its divisors is an integer number (11103735).

Almost surely, 2^72830645 is an apocalyptic number.

It is an amenable number.

72830645 is a deficient number, since it is larger than the sum of its proper divisors (15999235).

72830645 is a wasteful number, since it uses less digits than its factorization.

72830645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238855.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 72830645 is about 8534.0872388323. The cubic root of 72830645 is about 417.6104766979.

The spelling of 72830645 in words is "seventy-two million, eight hundred thirty thousand, six hundred forty-five".