63128280 has 32 divisors (see below), whose sum is σ = 189385200. Its totient is φ = 16834176.

The previous prime is 63128267. The next prime is 63128291. The reversal of 63128280 is 8282136.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 262915 + ... + 263154.

Almost surely, 2^63128280 is an apocalyptic number.

63128280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63128280 is an abundant number, since it is smaller than the sum of its proper divisors (126256920).

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

63128280 is a wasteful number, since it uses less digits than its factorization.

63128280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526083 (or 526079 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 63128280 is about 7945.3307042564. The cubic root of 63128280 is about 398.1756083047.

The spelling of 63128280 in words is "sixty-three million, one hundred twenty-eight thousand, two hundred eighty".