687228210 has 48 divisors (see below), whose sum is σ = 1820519064. Its totient is φ = 179801856.

The previous prime is 687228209. The next prime is 687228229. The reversal of 687228210 is 12822786.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 659000241 + 28227969 = 25671^2 + 5313^2 .

It is a super-2 number, since 2×687228210² = 944565225239608200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67267 + ... + 76806.

Almost surely, 2^687228210 is an apocalyptic number.

687228210 is an abundant number, since it is smaller than the sum of its proper divisors (1133290854).

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

687228210 is a wasteful number, since it uses less digits than its factorization.

687228210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144139 (or 144136 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 687228210 is about 26215.0378599765. The cubic root of 687228210 is about 882.4707638505.

The spelling of 687228210 in words is "six hundred eighty-seven million, two hundred twenty-eight thousand, two hundred ten".