28364304820 has 48 divisors (see below), whose sum is σ = 60481048320. Its totient is φ = 11172525696.

The previous prime is 28364304791. The next prime is 28364304847. The reversal of 28364304820 is 2840346382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315429 + ... + 395251.

It is an arithmetic number, because the mean of its divisors is an integer number (1260021840).

Almost surely, 2^28364304820 is an apocalyptic number.

28364304820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28364304820 is an abundant number, since it is smaller than the sum of its proper divisors (32116743500).

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

28364304820 is a wasteful number, since it uses less digits than its factorization.

28364304820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80104 (or 80102 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 28364304820 in words is "twenty-eight billion, three hundred sixty-four million, three hundred four thousand, eight hundred twenty".