28226015400 has 192 divisors, whose sum is σ = 97784366400. Its totient is φ = 6675712000.

The previous prime is 28226015371. The next prime is 28226015413. The reversal of 28226015400 is 451062282.

It is a super-2 number, since 2×28226015400² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 218446 + ... + 322754.

It is an arithmetic number, because the mean of its divisors is an integer number (509293575).

Almost surely, 2^28226015400 is an apocalyptic number.

28226015400 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 28226015400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48892183200).

28226015400 is an abundant number, since it is smaller than the sum of its proper divisors (69558351000).

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

28226015400 is a wasteful number, since it uses less digits than its factorization.

28226015400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104380 (or 104371 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 28226015400 its reverse (451062282), we get a palindrome (28677077682).

The spelling of 28226015400 in words is "twenty-eight billion, two hundred twenty-six million, fifteen thousand, four hundred".