28470229440 has 224 divisors, whose sum is σ = 93564846144. Its totient is φ = 7329546240.

The previous prime is 28470229427. The next prime is 28470229483. The reversal of 28470229440 is 4492207482.

It is a junction number, because it is equal to n+sod(n) for n = 28470229392 and 28470229401.

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, 3814192 + ... + 3821648.

It is an arithmetic number, because the mean of its divisors is an integer number (417700206).

Almost surely, 2^28470229440 is an apocalyptic number.

28470229440 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 28470229440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46782423072).

28470229440 is an abundant number, since it is smaller than the sum of its proper divisors (65094616704).

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

28470229440 is a wasteful number, since it uses less digits than its factorization.

28470229440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7615 (or 7605 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 28470229440 in words is "twenty-eight billion, four hundred seventy million, two hundred twenty-nine thousand, four hundred forty".