768357831 has 4 divisors (see below), whose sum is σ = 1024477112. Its totient is φ = 512238552.

The previous prime is 768357829. The next prime is 768357859. The reversal of 768357831 is 138753867.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 768357831 - 2¹ = 768357829 is a prime.

It is a super-2 number, since 2×768357831² = 1180747512918049122, 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 (768357431) 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 3 ways as a sum of consecutive naturals, for example, 128059636 + ... + 128059641.

It is an arithmetic number, because the mean of its divisors is an integer number (256119278).

Almost surely, 2^768357831 is an apocalyptic number.

768357831 is a deficient number, since it is larger than the sum of its proper divisors (256119281).

768357831 is a wasteful number, since it uses less digits than its factorization.

768357831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256119280.

The product of its digits is 846720, while the sum is 48.

The square root of 768357831 is about 27719.2682262718. The cubic root of 768357831 is about 915.9135991267.

It can be divided in two parts, 76835 and 7831, that added together give a triangular number (84666 = T₄₁₁).

The spelling of 768357831 in words is "seven hundred sixty-eight million, three hundred fifty-seven thousand, eight hundred thirty-one".