28478218944 has 224 divisors, whose sum is σ = 90788069376. Its totient is φ = 7706096640.

The previous prime is 28478218931. The next prime is 28478218949. The reversal of 28478218944 is 44981287482.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×28478218944² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28478218949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1950937 + ... + 1965479.

Almost surely, 2^28478218944 is an apocalyptic number.

28478218944 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 28478218944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45394034688).

28478218944 is an abundant number, since it is smaller than the sum of its proper divisors (62309850432).

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

28478218944 is a wasteful number, since it uses less digits than its factorization.

28478218944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14643 (or 14633 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 57.

The spelling of 28478218944 in words is "twenty-eight billion, four hundred seventy-eight million, two hundred eighteen thousand, nine hundred forty-four".