63128885 has 8 divisors (see below), whose sum is σ = 75876696. Its totient is φ = 50421760.

The previous prime is 63128873. The next prime is 63128899. The reversal of 63128885 is 58882136.

63128885 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 7447441 + 55681444 = 2729^2 + 7462^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63128885 - 2¹⁴ = 63112501 is a prime.

It is a super-2 number, since 2×63128885² = 7970512242686450, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

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, 6644 + ... + 13053.

It is an arithmetic number, because the mean of its divisors is an integer number (9484587).

Almost surely, 2^63128885 is an apocalyptic number.

It is an amenable number.

63128885 is a deficient number, since it is larger than the sum of its proper divisors (12747811).

63128885 is a wasteful number, since it uses less digits than its factorization.

63128885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20343.

The product of its digits is 92160, while the sum is 41.

The square root of 63128885 is about 7945.3687768410. The cubic root of 63128885 is about 398.1768802939.

The spelling of 63128885 in words is "sixty-three million, one hundred twenty-eight thousand, eight hundred eighty-five".