72857873 has 8 divisors (see below), whose sum is σ = 79587360. Its totient is φ = 66146080.

The previous prime is 72857791. The next prime is 72857893. The reversal of 72857873 is 37875827.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-72857873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72857893) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5093 + ... + 13101.

It is an arithmetic number, because the mean of its divisors is an integer number (9948420).

Almost surely, 2^72857873 is an apocalyptic number.

It is an amenable number.

72857873 is a deficient number, since it is larger than the sum of its proper divisors (6729487).

72857873 is a wasteful number, since it uses less digits than its factorization.

72857873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8847.

The product of its digits is 658560, while the sum is 47.

The square root of 72857873 is about 8535.6823394501. The cubic root of 72857873 is about 417.6625119429.

The spelling of 72857873 in words is "seventy-two million, eight hundred fifty-seven thousand, eight hundred seventy-three".