63728811 has 12 divisors (see below), whose sum is σ = 93162888. Its totient is φ = 41973504.

The previous prime is 63728809. The next prime is 63728827. The reversal of 63728811 is 11882736.

63728811 is a `hidden beast` number, since 637 + 2 + 8 + 8 + 11 = 666.

It is not a de Polignac number, because 63728811 - 2¹ = 63728809 is a prime.

It is a super-2 number, since 2×63728811² = 8122722702947442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63728891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41910 + ... + 43403.

It is an arithmetic number, because the mean of its divisors is an integer number (7763574).

Almost surely, 2^63728811 is an apocalyptic number.

63728811 is a deficient number, since it is larger than the sum of its proper divisors (29434077).

63728811 is a wasteful number, since it uses less digits than its factorization.

63728811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85402 (or 85399 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 63728811 is about 7983.0326944088. The cubic root of 63728811 is about 399.4342230350.

The spelling of 63728811 in words is "sixty-three million, seven hundred twenty-eight thousand, eight hundred eleven".