28424257860 has 96 divisors (see below), whose sum is σ = 80898048000. Its totient is φ = 7455530880.

The previous prime is 28424257853. The next prime is 28424257861. The reversal of 28424257860 is 6875242482.

It is not an unprimeable number, because it can be changed into a prime (28424257861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1862541 + ... + 1877739.

It is an arithmetic number, because the mean of its divisors is an integer number (842688000).

Almost surely, 2^28424257860 is an apocalyptic number.

28424257860 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 28424257860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40449024000).

28424257860 is an abundant number, since it is smaller than the sum of its proper divisors (52473790140).

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

28424257860 is a wasteful number, since it uses less digits than its factorization.

28424257860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15721 (or 15719 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 48.

The spelling of 28424257860 in words is "twenty-eight billion, four hundred twenty-four million, two hundred fifty-seven thousand, eight hundred sixty".