28799316820 has 48 divisors (see below), whose sum is σ = 66101833728. Its totient is φ = 10492346880.

The previous prime is 28799316773. The next prime is 28799316827. The reversal of 28799316820 is 2861399782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28799316827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1355652 + ... + 1376731.

It is an arithmetic number, because the mean of its divisors is an integer number (1377121536).

Almost surely, 2^28799316820 is an apocalyptic number.

28799316820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28799316820 is an abundant number, since it is smaller than the sum of its proper divisors (37302516908).

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

28799316820 is a wasteful number, since it uses less digits than its factorization.

28799316820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732440 (or 2732438 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 28799316820 in words is "twenty-eight billion, seven hundred ninety-nine million, three hundred sixteen thousand, eight hundred twenty".