28309245300 has 324 divisors, whose sum is σ = 103557770316. Its totient is φ = 6449587200.

The previous prime is 28309245281. The next prime is 28309245337. The reversal of 28309245300 is 354290382.

28309245300 is a `hidden beast` number, since 2 + 8 + 30 + 92 + 4 + 530 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 509796 + 28308735504 = 714^2 + 168252^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 16448440 + ... + 16450160.

Almost surely, 2^28309245300 is an apocalyptic number.

28309245300 is a gapful number since it is divisible by the number (20) 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 28309245300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51778885158).

28309245300 is an abundant number, since it is smaller than the sum of its proper divisors (75248525016).

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

28309245300 is a wasteful number, since it uses less digits than its factorization.

28309245300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 28309245300 in words is "twenty-eight billion, three hundred nine million, two hundred forty-five thousand, three hundred".