686533938 has 8 divisors (see below), whose sum is σ = 1373067888. Its totient is φ = 228844644.

The previous prime is 686533931. The next prime is 686533943. The reversal of 686533938 is 839335686.

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

686533938 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (686533931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57211156 + ... + 57211167.

It is an arithmetic number, because the mean of its divisors is an integer number (171633486).

Almost surely, 2^686533938 is an apocalyptic number.

686533938 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.

686533938 is a wasteful number, since it uses less digits than its factorization.

686533938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114422328.

The product of its digits is 2799360, while the sum is 51.

The square root of 686533938 is about 26201.7926485956. The cubic root of 686533938 is about 882.1734918200.

The spelling of 686533938 in words is "six hundred eighty-six million, five hundred thirty-three thousand, nine hundred thirty-eight".