28220416000 has 448 divisors, whose sum is σ = 83746750464. Its totient is φ = 9289728000.

The previous prime is 28220415889. The next prime is 28220416019. The reversal of 28220416000 is 61402282.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222207937 + ... + 222208063.

Almost surely, 2^28220416000 is an apocalyptic number.

28220416000 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 28220416000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41873375232).

28220416000 is an abundant number, since it is smaller than the sum of its proper divisors (55526334464).

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

28220416000 is an equidigital number, since it uses as much as digits as its factorization.

28220416000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 28220416000 its reverse (61402282), we get a palindrome (28281818282).

The spelling of 28220416000 in words is "twenty-eight billion, two hundred twenty million, four hundred sixteen thousand".