63642280 has 32 divisors (see below), whose sum is σ = 154211400. Its totient is φ = 23498496.

The previous prime is 63642259. The next prime is 63642281. The reversal of 63642280 is 8224636.

63642280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 52446564 + 11195716 = 7242^2 + 3346^2 .

It is not an unprimeable number, because it can be changed into a prime (63642281) 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 7 ways as a sum of consecutive naturals, for example, 60675 + ... + 61714.

Almost surely, 2^63642280 is an apocalyptic number.

It is an amenable number.

63642280 is an abundant number, since it is smaller than the sum of its proper divisors (90569120).

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

63642280 is a wasteful number, since it uses less digits than its factorization.

63642280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122413 (or 122409 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 63642280 is about 7977.6111712718. The cubic root of 63642280 is about 399.2533571784.

The spelling of 63642280 in words is "sixty-three million, six hundred forty-two thousand, two hundred eighty".