72847831 has 16 divisors (see below), whose sum is σ = 88358400. Its totient is φ = 58706208.

The previous prime is 72847829. The next prime is 72847849. The reversal of 72847831 is 13874827.

It is a cyclic number.

It is not a de Polignac number, because 72847831 - 2¹ = 72847829 is a prime.

It is a super-2 number, since 2×72847831² = 10613612962809122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72847331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5665 + ... + 13333.

It is an arithmetic number, because the mean of its divisors is an integer number (5522400).

Almost surely, 2^72847831 is an apocalyptic number.

72847831 is a deficient number, since it is larger than the sum of its proper divisors (15510569).

72847831 is a wasteful number, since it uses less digits than its factorization.

72847831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7758.

The product of its digits is 75264, while the sum is 40.

The square root of 72847831 is about 8535.0940826683. The cubic root of 72847831 is about 417.6433222544.

The spelling of 72847831 in words is "seventy-two million, eight hundred forty-seven thousand, eight hundred thirty-one".