28710637696 has 128 divisors (see below), whose sum is σ = 63478598400. Its totient is φ = 12850176000.

The previous prime is 28710637691. The next prime is 28710637729. The reversal of 28710637696 is 69673601782.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (28710637691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12210921 + ... + 12213271.

It is an arithmetic number, because the mean of its divisors is an integer number (495926550).

Almost surely, 2^28710637696 is an apocalyptic number.

28710637696 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28710637696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31739299200).

28710637696 is an abundant number, since it is smaller than the sum of its proper divisors (34767960704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28710637696 is a wasteful number, since it uses less digits than its factorization.

28710637696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598 (or 2586 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 28710637696 in words is "twenty-eight billion, seven hundred ten million, six hundred thirty-seven thousand, six hundred ninety-six".