28203919200 has 432 divisors, whose sum is σ = 107685138960. Its totient is φ = 7123230720.

The previous prime is 28203919169. The next prime is 28203919223. The reversal of 28203919200 is 291930282.

It is a tau number, because it is divible by the number of its divisors (432).

It is a super-2 number, since 2×28203919200² (a number of 22 digits) contains 22 as substring.

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 71 ways as a sum of consecutive naturals, for example, 7795792 + ... + 7799408.

It is an arithmetic number, because the mean of its divisors is an integer number (249271155).

Almost surely, 2^28203919200 is an apocalyptic number.

28203919200 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 28203919200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53842569480).

28203919200 is an abundant number, since it is smaller than the sum of its proper divisors (79481219760).

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

28203919200 is a wasteful number, since it uses less digits than its factorization.

28203919200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3684 (or 3646 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 28203919200 in words is "twenty-eight billion, two hundred three million, nine hundred nineteen thousand, two hundred".