687242568 has 32 divisors (see below), whose sum is σ = 1719410400. Its totient is φ = 228907008.

The previous prime is 687242539. The next prime is 687242581. The reversal of 687242568 is 865242786.

It is a super-3 number, since 3×687242568³ (a number of 27 digits) contains 333 as substring.

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, 23655 + ... + 43977.

It is an arithmetic number, because the mean of its divisors is an integer number (53731575).

Almost surely, 2^687242568 is an apocalyptic number.

It is an amenable number.

687242568 is an abundant number, since it is smaller than the sum of its proper divisors (1032167832).

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

687242568 is a wasteful number, since it uses less digits than its factorization.

687242568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21741 (or 21737 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The square root of 687242568 is about 26215.3117089994. The cubic root of 687242568 is about 882.4769095174.

The spelling of 687242568 in words is "six hundred eighty-seven million, two hundred forty-two thousand, five hundred sixty-eight".