28267475400 has 144 divisors (see below), whose sum is σ = 95569636500. Its totient is φ = 7487331840.

The previous prime is 28267475393. The next prime is 28267475449. The reversal of 28267475400 is 457476282.

It is a happy number.

28267475400 is a `hidden beast` number, since 2 + 8 + 2 + 67 + 47 + 540 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 2180703204 + 26086772196 = 46698^2 + 161514^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 215502 + ... + 320898.

Almost surely, 2^28267475400 is an apocalyptic number.

28267475400 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 28267475400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47784818250).

28267475400 is an abundant number, since it is smaller than the sum of its proper divisors (67302161100).

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

28267475400 is a wasteful number, since it uses less digits than its factorization.

28267475400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105568 (or 105556 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 28267475400 in words is "twenty-eight billion, two hundred sixty-seven million, four hundred seventy-five thousand, four hundred".