63868540 has 24 divisors (see below), whose sum is σ = 134370432. Its totient is φ = 25500480.

The previous prime is 63868523. The next prime is 63868559. The reversal of 63868540 is 4586836.

It is a junction number, because it is equal to n+sod(n) for n = 63868493 and 63868502.

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, 9510 + ... + 14770.

It is an arithmetic number, because the mean of its divisors is an integer number (5598768).

Almost surely, 2^63868540 is an apocalyptic number.

It is an amenable number.

63868540 is an abundant number, since it is smaller than the sum of its proper divisors (70501892).

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

63868540 is a wasteful number, since it uses less digits than its factorization.

63868540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5877 (or 5875 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 63868540 is about 7991.7795264885. The cubic root of 63868540 is about 399.7259372669.

The spelling of 63868540 in words is "sixty-three million, eight hundred sixty-eight thousand, five hundred forty".