687972226 has 16 divisors (see below), whose sum is σ = 1054557504. Its totient is φ = 336533904.

The previous prime is 687972217. The next prime is 687972227. The reversal of 687972226 is 622279786.

It is a self number, because there is not a number n which added to its sum of digits gives 687972226.

It is not an unprimeable number, because it can be changed into a prime (687972227) 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, 3021 + ... + 37216.

It is an arithmetic number, because the mean of its divisors is an integer number (65909844).

Almost surely, 2^687972226 is an apocalyptic number.

687972226 is a deficient number, since it is larger than the sum of its proper divisors (366585278).

687972226 is a wasteful number, since it uses less digits than its factorization.

687972226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40425.

The product of its digits is 1016064, while the sum is 49.

The square root of 687972226 is about 26229.2246549531. The cubic root of 687972226 is about 882.7891130094.

The spelling of 687972226 in words is "six hundred eighty-seven million, nine hundred seventy-two thousand, two hundred twenty-six".