686133744 has 20 divisors (see below), whose sum is σ = 1772512296. Its totient is φ = 228711232.

The previous prime is 686133739. The next prime is 686133793. The reversal of 686133744 is 447331686.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 686133696 and 686133705.

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, 7147179 + ... + 7147274.

Almost surely, 2^686133744 is an apocalyptic number.

It is an amenable number.

686133744 is an abundant number, since it is smaller than the sum of its proper divisors (1086378552).

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

686133744 is a wasteful number, since it uses less digits than its factorization.

686133744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14294464 (or 14294458 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 686133744 is about 26194.1547678103. The cubic root of 686133744 is about 882.0020464677.

The spelling of 686133744 in words is "six hundred eighty-six million, one hundred thirty-three thousand, seven hundred forty-four".