63865740 has 48 divisors (see below), whose sum is σ = 181504512. Its totient is φ = 16775616.

The previous prime is 63865727. The next prime is 63865799. The reversal of 63865740 is 4756836.

63865740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3924 + ... + 11963.

It is an arithmetic number, because the mean of its divisors is an integer number (3781344).

Almost surely, 2^63865740 is an apocalyptic number.

63865740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63865740 is an abundant number, since it is smaller than the sum of its proper divisors (117638772).

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

63865740 is a wasteful number, since it uses less digits than its factorization.

63865740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15966 (or 15964 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 63865740 is about 7991.6043445606. The cubic root of 63865740 is about 399.7200958465.

The spelling of 63865740 in words is "sixty-three million, eight hundred sixty-five thousand, seven hundred forty".