63840680 has 32 divisors (see below), whose sum is σ = 143872200. Its totient is φ = 25495296.

The previous prime is 63840677. The next prime is 63840683. The reversal of 63840680 is 8604836.

It is an interprime number because it is at equal distance from previous prime (63840677) and next prime (63840683).

It can be written as a sum of positive squares in 4 ways, for example, as 59320804 + 4519876 = 7702^2 + 2126^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63840680.

It is not an unprimeable number, because it can be changed into a prime (63840683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42014 + ... + 43506.

Almost surely, 2^63840680 is an apocalyptic number.

It is an amenable number.

63840680 is an abundant number, since it is smaller than the sum of its proper divisors (80031520).

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

63840680 is a wasteful number, since it uses less digits than its factorization.

63840680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573 (or 2569 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 63840680 is about 7990.0362952868. The cubic root of 63840680 is about 399.6678075301.

The spelling of 63840680 in words is "sixty-three million, eight hundred forty thousand, six hundred eighty".