63888940 has 24 divisors (see below), whose sum is σ = 140001120. Its totient is φ = 24444288.

The previous prime is 63888931. The next prime is 63888967. The reversal of 63888940 is 4988836.

It is a Harshad number since it is a multiple of its sum of digits (46).

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, 68985 + ... + 69904.

It is an arithmetic number, because the mean of its divisors is an integer number (5833380).

Almost surely, 2^63888940 is an apocalyptic number.

It is an amenable number.

63888940 is an abundant number, since it is smaller than the sum of its proper divisors (76112180).

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

63888940 is a wasteful number, since it uses less digits than its factorization.

63888940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138921 (or 138919 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 63888940 is about 7993.0557360749. The cubic root of 63888940 is about 399.7684910348.

The spelling of 63888940 in words is "sixty-three million, eight hundred eighty-eight thousand, nine hundred forty".