686436942 has 8 divisors (see below), whose sum is σ = 1372873896. Its totient is φ = 228812312.

The previous prime is 686436929. The next prime is 686436953. The reversal of 686436942 is 249634686.

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

686436942 is an admirable number.

It is a super-2 number, since 2×686436942² = 942391350684622728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 686436891 and 686436900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57203073 + ... + 57203084.

It is an arithmetic number, because the mean of its divisors is an integer number (171609237).

Almost surely, 2^686436942 is an apocalyptic number.

686436942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

686436942 is a wasteful number, since it uses less digits than its factorization.

686436942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114406162.

The product of its digits is 1492992, while the sum is 48.

The square root of 686436942 is about 26199.9416411564. The cubic root of 686436942 is about 882.1319443085.

It can be divided in two parts, 686436 and 942, that added together give a triangular number (687378 = T₁₁₇₂).

The spelling of 686436942 in words is "six hundred eighty-six million, four hundred thirty-six thousand, nine hundred forty-two".