686869026 has 16 divisors (see below), whose sum is σ = 1374024384. Its totient is φ = 228908624.

The previous prime is 686869021. The next prime is 686869049. The reversal of 686869026 is 620968686.

It is a self number, because there is not a number n which added to its sum of digits gives 686869026.

It is not an unprimeable number, because it can be changed into a prime (686869021) 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, 31315 + ... + 48521.

It is an arithmetic number, because the mean of its divisors is an integer number (85876524).

Almost surely, 2^686869026 is an apocalyptic number.

686869026 is an abundant number, since it is smaller than the sum of its proper divisors (687155358).

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

686869026 is a wasteful number, since it uses less digits than its factorization.

686869026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23865.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 686869026 is about 26208.1862401808. The cubic root of 686869026 is about 882.3169941554.

The spelling of 686869026 in words is "six hundred eighty-six million, eight hundred sixty-nine thousand, twenty-six".