28294471800 has 576 divisors, whose sum is σ = 115294629600. Its totient is φ = 6357657600.

The previous prime is 28294471771. The next prime is 28294471819. The reversal of 28294471800 is 817449282.

28294471800 is a `hidden beast` number, since 2 + 8 + 29 + 447 + 180 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 16139724 + ... + 16141476.

Almost surely, 2^28294471800 is an apocalyptic number.

28294471800 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 28294471800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57647314800).

28294471800 is an abundant number, since it is smaller than the sum of its proper divisors (87000157800).

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

28294471800 is a wasteful number, since it uses less digits than its factorization.

28294471800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853 (or 1831 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 28294471800 in words is "twenty-eight billion, two hundred ninety-four million, four hundred seventy-one thousand, eight hundred".