687252412 has 72 divisors (see below), whose sum is σ = 1525499360. Its totient is φ = 265161600.

The previous prime is 687252409. The next prime is 687252437. The reversal of 687252412 is 214252786.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 368362 + ... + 370222.

Almost surely, 2^687252412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687252412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (762749680).

687252412 is an abundant number, since it is smaller than the sum of its proper divisors (838246948).

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

687252412 is a wasteful number, since it uses less digits than its factorization.

687252412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003 (or 1990 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 687252412 is about 26215.4994611966. The cubic root of 687252412 is about 882.4811230036.

The spelling of 687252412 in words is "six hundred eighty-seven million, two hundred fifty-two thousand, four hundred twelve".