686991452 has 24 divisors (see below), whose sum is σ = 1376032896. Its totient is φ = 293985648.

The previous prime is 686991451. The next prime is 686991463. The reversal of 686991452 is 254199686.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 686991452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686991451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163 + ... + 37085.

It is an arithmetic number, because the mean of its divisors is an integer number (57334704).

Almost surely, 2^686991452 is an apocalyptic number.

It is an amenable number.

686991452 is an abundant number, since it is smaller than the sum of its proper divisors (689041444).

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

686991452 is a wasteful number, since it uses less digits than its factorization.

686991452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36617 (or 36615 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 686991452 is about 26210.5217803843. The cubic root of 686991452 is about 882.3694117776.

The spelling of 686991452 in words is "six hundred eighty-six million, nine hundred ninety-one thousand, four hundred fifty-two".