72842831 has 8 divisors (see below), whose sum is σ = 74041440. Its totient is φ = 71649792.

The previous prime is 72842821. The next prime is 72842837. The reversal of 72842831 is 13824827.

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

It is not a de Polignac number, because 72842831 - 2⁶ = 72842767 is a prime.

It is a super-2 number, since 2×72842831² = 10612156056189122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72842791 and 72842800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72842837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30911 + ... + 33183.

It is an arithmetic number, because the mean of its divisors is an integer number (9255180).

Almost surely, 2^72842831 is an apocalyptic number.

72842831 is a deficient number, since it is larger than the sum of its proper divisors (1198609).

72842831 is a wasteful number, since it uses less digits than its factorization.

72842831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785.

The product of its digits is 21504, while the sum is 35.

The square root of 72842831 is about 8534.8011693302. The cubic root of 72842831 is about 417.6337668823.

The spelling of 72842831 in words is "seventy-two million, eight hundred forty-two thousand, eight hundred thirty-one".