28058017440 has 144 divisors (see below), whose sum is σ = 93279882528. Its totient is φ = 7088297472.

The previous prime is 28058017433. The next prime is 28058017441. The reversal of 28058017440 is 4471085082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28058017441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92319 + ... + 254241.

It is an arithmetic number, because the mean of its divisors is an integer number (647776962).

Almost surely, 2^28058017440 is an apocalyptic number.

28058017440 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 28058017440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46639941264).

28058017440 is an abundant number, since it is smaller than the sum of its proper divisors (65221865088).

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

28058017440 is a wasteful number, since it uses less digits than its factorization.

28058017440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161979 (or 161952 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The spelling of 28058017440 in words is "twenty-eight billion, fifty-eight million, seventeen thousand, four hundred forty".