28704638632 has 16 divisors (see below), whose sum is σ = 53942696640. Its totient is φ = 14319919536.

The previous prime is 28704638629. The next prime is 28704638701. The reversal of 28704638632 is 23683640782.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4046208 + ... + 4053295.

It is an arithmetic number, because the mean of its divisors is an integer number (3371418540).

Almost surely, 2^28704638632 is an apocalyptic number.

It is an amenable number.

28704638632 is a deficient number, since it is larger than the sum of its proper divisors (25238058008).

28704638632 is a wasteful number, since it uses less digits than its factorization.

28704638632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8099952 (or 8099948 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 49.

The spelling of 28704638632 in words is "twenty-eight billion, seven hundred four million, six hundred thirty-eight thousand, six hundred thirty-two".