28057200000 has 384 divisors, whose sum is σ = 94471453440. Its totient is φ = 7376640000.

The previous prime is 28057199987. The next prime is 28057200023. The reversal of 28057200000 is 275082.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123599887 + ... + 123600113.

It is an arithmetic number, because the mean of its divisors is an integer number (246019410).

Almost surely, 2^28057200000 is an apocalyptic number.

28057200000 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 28057200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47235726720).

28057200000 is an abundant number, since it is smaller than the sum of its proper divisors (66414253440).

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

28057200000 is an equidigital number, since it uses as much as digits as its factorization.

28057200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

Adding to 28057200000 its reverse (275082), we get a palindrome (28057475082).

The spelling of 28057200000 in words is "twenty-eight billion, fifty-seven million, two hundred thousand".