28474281144 has 96 divisors (see below), whose sum is σ = 81324594000. Its totient is φ = 8975494656.

The previous prime is 28474281137. The next prime is 28474281191. The reversal of 28474281144 is 44118247482.

28474281144 is a `hidden beast` number, since 2 + 84 + 7 + 428 + 1 + 144 = 666.

It is a super-3 number, since 3×28474281144³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28474281144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 743292 + ... + 780660.

Almost surely, 2^28474281144 is an apocalyptic number.

28474281144 is a gapful number since it is divisible by the number (24) 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 28474281144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40662297000).

28474281144 is an abundant number, since it is smaller than the sum of its proper divisors (52850312856).

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

28474281144 is a wasteful number, since it uses less digits than its factorization.

28474281144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37957 (or 37950 counting only the distinct ones).

The product of its digits is 458752, while the sum is 45.

The spelling of 28474281144 in words is "twenty-eight billion, four hundred seventy-four million, two hundred eighty-one thousand, one hundred forty-four".