63280440 has 80 divisors (see below), whose sum is σ = 212703480. Its totient is φ = 16873920.

The previous prime is 63280421. The next prime is 63280447. The reversal of 63280440 is 4408236.

63280440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63280447) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 6526 + ... + 13005.

Almost surely, 2^63280440 is an apocalyptic number.

63280440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63280440 is an abundant number, since it is smaller than the sum of its proper divisors (149423040).

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

63280440 is a wasteful number, since it uses less digits than its factorization.

63280440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19554 (or 19541 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 63280440 is about 7954.9003764975. The cubic root of 63280440 is about 398.4952631825.

Adding to 63280440 its reverse (4408236), we get a palindrome (67688676).

The spelling of 63280440 in words is "sixty-three million, two hundred eighty thousand, four hundred forty".