63948640 has 48 divisors (see below), whose sum is σ = 172664352. Its totient is φ = 21924864.

The previous prime is 63948593. The next prime is 63948667. The reversal of 63948640 is 4684936.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 63948593 and 63948602.

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, 27429 + ... + 29668.

It is an arithmetic number, because the mean of its divisors is an integer number (3597174).

Almost surely, 2^63948640 is an apocalyptic number.

It is an amenable number.

63948640 is an abundant number, since it is smaller than the sum of its proper divisors (108715712).

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

63948640 is a wasteful number, since it uses less digits than its factorization.

63948640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57119 (or 57111 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 63948640 is about 7996.7893557352. The cubic root of 63948640 is about 399.8929713647.

The spelling of 63948640 in words is "sixty-three million, nine hundred forty-eight thousand, six hundred forty".