72828157 has 2 divisors, whose sum is σ = 72828158. Its totient is φ = 72828156.

The previous prime is 72828149. The next prime is 72828163. The reversal of 72828157 is 75182827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56715961 + 16112196 = 7531^2 + 4014^2 .

It is a cyclic number.

It is not a de Polignac number, because 72828157 - 2³ = 72828149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72828137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36414078 + 36414079.

It is an arithmetic number, because the mean of its divisors is an integer number (36414079).

Almost surely, 2^72828157 is an apocalyptic number.

It is an amenable number.

72828157 is a deficient number, since it is larger than the sum of its proper divisors (1).

72828157 is an equidigital number, since it uses as much as digits as its factorization.

72828157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 40.

The square root of 72828157 is about 8533.9414692157. The cubic root of 72828157 is about 417.6057212514.

The spelling of 72828157 in words is "seventy-two million, eight hundred twenty-eight thousand, one hundred fifty-seven".