28611230728 has 32 divisors (see below), whose sum is σ = 54011813760. Its totient is φ = 14208384960.

The previous prime is 28611230723. The next prime is 28611230789. The reversal of 28611230728 is 82703211682.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28611230723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745825 + ... + 783247.

It is an arithmetic number, because the mean of its divisors is an integer number (1687869180).

Almost surely, 2^28611230728 is an apocalyptic number.

It is an amenable number.

28611230728 is a deficient number, since it is larger than the sum of its proper divisors (25400583032).

28611230728 is a wasteful number, since it uses less digits than its factorization.

28611230728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38077 (or 38073 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 28611230728 in words is "twenty-eight billion, six hundred eleven million, two hundred thirty thousand, seven hundred twenty-eight".