687599226 has 64 divisors (see below), whose sum is σ = 1555977600. Its totient is φ = 225042048.

The previous prime is 687599207. The next prime is 687599249. The reversal of 687599226 is 622995786.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 831025 + ... + 831851.

It is an arithmetic number, because the mean of its divisors is an integer number (24312150).

Almost surely, 2^687599226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687599226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777988800).

687599226 is an abundant number, since it is smaller than the sum of its proper divisors (868378374).

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

687599226 is a wasteful number, since it uses less digits than its factorization.

687599226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100 (or 1094 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 687599226 is about 26222.1133015629. The cubic root of 687599226 is about 882.6295426791.

The spelling of 687599226 in words is "six hundred eighty-seven million, five hundred ninety-nine thousand, two hundred twenty-six".