28809444700 has 36 divisors (see below), whose sum is σ = 62540294040. Its totient is φ = 11519391040.

The previous prime is 28809444691. The next prime is 28809444709. The reversal of 28809444700 is 744490882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28809444691) and next prime (28809444709).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28809444709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215811 + ... + 322789.

It is an arithmetic number, because the mean of its divisors is an integer number (1737230390).

Almost surely, 2^28809444700 is an apocalyptic number.

28809444700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28809444700 is an abundant number, since it is smaller than the sum of its proper divisors (33730849340).

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

28809444700 is a wasteful number, since it uses less digits than its factorization.

28809444700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109686 (or 109679 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 28809444700 in words is "twenty-eight billion, eight hundred nine million, four hundred forty-four thousand, seven hundred".