78230831 has 8 divisors (see below), whose sum is σ = 89460864. Its totient is φ = 67014360.

The previous prime is 78230819. The next prime is 78230833. The reversal of 78230831 is 13803287.

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

It is not a de Polignac number, because 78230831 - 2¹⁰ = 78229807 is a prime.

It is a super-2 number, since 2×78230831² = 12240125837901122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78230833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17936 + ... + 21866.

It is an arithmetic number, because the mean of its divisors is an integer number (11182608).

Almost surely, 2^78230831 is an apocalyptic number.

78230831 is a deficient number, since it is larger than the sum of its proper divisors (11230033).

78230831 is a wasteful number, since it uses less digits than its factorization.

78230831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6781.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 78230831 is about 8844.8194441718. The cubic root of 78230831 is about 427.6869326002.

It can be divided in two parts, 782 and 30831, that added together give a palindrome (31613).

The spelling of 78230831 in words is "seventy-eight million, two hundred thirty thousand, eight hundred thirty-one".