687252244 has 36 divisors (see below), whose sum is σ = 1400705460. Its totient is φ = 294188160.

The previous prime is 687252233. The next prime is 687252253. The reversal of 687252244 is 442252786.

It can be written as a sum of positive squares in 2 ways, for example, as 270602500 + 416649744 = 16450^2 + 20412^2 .

It is a super-3 number, since 3×687252244³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 687252197 and 687252206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229992 + ... + 232960.

It is an arithmetic number, because the mean of its divisors is an integer number (38908485).

Almost surely, 2^687252244 is an apocalyptic number.

It is an amenable number.

687252244 is an abundant number, since it is smaller than the sum of its proper divisors (713453216).

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

687252244 is a wasteful number, since it uses less digits than its factorization.

687252244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168 (or 4159 counting only the distinct ones).

The product of its digits is 215040, while the sum is 40.

The square root of 687252244 is about 26215.4962569851. The cubic root of 687252244 is about 882.4810510956.

The spelling of 687252244 in words is "six hundred eighty-seven million, two hundred fifty-two thousand, two hundred forty-four".