856129208 has 48 divisors (see below), whose sum is σ = 1857345000. Its totient is φ = 368660160.

The previous prime is 856129187. The next prime is 856129229. The reversal of 856129208 is 802921658.

It is an interprime number because it is at equal distance from previous prime (856129187) and next prime (856129229).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4883 + ... + 41666.

Almost surely, 2^856129208 is an apocalyptic number.

856129208 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

856129208 is an abundant number, since it is smaller than the sum of its proper divisors (1001215792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856129208 is a wasteful number, since it uses less digits than its factorization.

856129208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46596 (or 46581 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 856129208 is about 29259.6857125978. The cubic root of 856129208 is about 949.5396506449.

The spelling of 856129208 in words is "eight hundred fifty-six million, one hundred twenty-nine thousand, two hundred eight".