72828530 has 8 divisors (see below), whose sum is σ = 131091372. Its totient is φ = 29131408.

The previous prime is 72828529. The next prime is 72828583. The reversal of 72828530 is 3582827.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71893441 + 935089 = 8479^2 + 967^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3641417 + ... + 3641436.

Almost surely, 2^72828530 is an apocalyptic number.

72828530 is a deficient number, since it is larger than the sum of its proper divisors (58262842).

72828530 is a wasteful number, since it uses less digits than its factorization.

72828530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7282860.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 72828530 is about 8533.9633230991. The cubic root of 72828530 is about 417.6064341930.

The spelling of 72828530 in words is "seventy-two million, eight hundred twenty-eight thousand, five hundred thirty".