72857830 has 16 divisors (see below), whose sum is σ = 131387184. Its totient is φ = 29089120.

The previous prime is 72857791. The next prime is 72857893. The reversal of 72857830 is 3875827.

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, 841 + ... + 12100.

It is an arithmetic number, because the mean of its divisors is an integer number (8211699).

Almost surely, 2^72857830 is an apocalyptic number.

72857830 is a deficient number, since it is larger than the sum of its proper divisors (58529354).

72857830 is a wasteful number, since it uses less digits than its factorization.

72857830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13511.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 72857830 is about 8535.6798206118. The cubic root of 72857830 is about 417.6624297761.

The spelling of 72857830 in words is "seventy-two million, eight hundred fifty-seven thousand, eight hundred thirty".