63728194828 has 24 divisors (see below), whose sum is σ = 114789265472. Its totient is φ = 30935032704.

The previous prime is 63728194801. The next prime is 63728194841. The reversal of 63728194828 is 82849182736.

It is a happy number.

It is a super-2 number, since 2×63728194828² (a number of 22 digits) contains 22 as substring.

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, 403476 + ... + 538747.

Almost surely, 2^63728194828 is an apocalyptic number.

It is an amenable number.

63728194828 is a deficient number, since it is larger than the sum of its proper divisors (51061070644).

63728194828 is a wasteful number, since it uses less digits than its factorization.

63728194828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942721 (or 942719 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 58.

The spelling of 63728194828 in words is "sixty-three billion, seven hundred twenty-eight million, one hundred ninety-four thousand, eight hundred twenty-eight".