28699084720 has 20 divisors (see below), whose sum is σ = 66725372160. Its totient is φ = 11479633856.

The previous prime is 28699084697. The next prime is 28699084723. The reversal of 28699084720 is 2748099682.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (28699084723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179369200 + ... + 179369359.

It is an arithmetic number, because the mean of its divisors is an integer number (3336268608).

Almost surely, 2^28699084720 is an apocalyptic number.

28699084720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28699084720 is an abundant number, since it is smaller than the sum of its proper divisors (38026287440).

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

28699084720 is a wasteful number, since it uses less digits than its factorization.

28699084720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358738572 (or 358738566 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 28699084720 in words is "twenty-eight billion, six hundred ninety-nine million, eighty-four thousand, seven hundred twenty".