63880040 has 64 divisors (see below), whose sum is σ = 169948800. Its totient is φ = 21143808.

The previous prime is 63880031. The next prime is 63880043. The reversal of 63880040 is 4008836.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 63879985 and 63880012.

It is not an unprimeable number, because it can be changed into a prime (63880043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4187 + ... + 12053.

It is an arithmetic number, because the mean of its divisors is an integer number (2655450).

Almost surely, 2^63880040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63880040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84974400).

63880040 is an abundant number, since it is smaller than the sum of its proper divisors (106068760).

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

63880040 is a wasteful number, since it uses less digits than its factorization.

63880040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7914 (or 7910 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 63880040 is about 7992.4989834219. The cubic root of 63880040 is about 399.7499270247.

Adding to 63880040 its reverse (4008836), we get a palindrome (67888876).

The spelling of 63880040 in words is "sixty-three million, eight hundred eighty thousand, forty".