687468028 has 24 divisors (see below), whose sum is σ = 1337409920. Its totient is φ = 307056960.

The previous prime is 687468011. The next prime is 687468037. The reversal of 687468028 is 820864786.

It is a super-2 number, since 2×687468028² = 945224579044417568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211623 + ... + 214846.

Almost surely, 2^687468028 is an apocalyptic number.

It is an amenable number.

687468028 is a deficient number, since it is larger than the sum of its proper divisors (649941892).

687468028 is a wasteful number, since it uses less digits than its factorization.

687468028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426517 (or 426515 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 49.

The square root of 687468028 is about 26219.6115150473. The cubic root of 687468028 is about 882.5734021289.

The spelling of 687468028 in words is "six hundred eighty-seven million, four hundred sixty-eight thousand, twenty-eight".