28574561240 has 128 divisors (see below), whose sum is σ = 68276736000. Its totient is φ = 10745602560.

The previous prime is 28574561233. The next prime is 28574561261. The reversal of 28574561240 is 4216547582.

It is a junction number, because it is equal to n+sod(n) for n = 28574561191 and 28574561200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10609334 + ... + 10612026.

It is an arithmetic number, because the mean of its divisors is an integer number (533412000).

Almost surely, 2^28574561240 is an apocalyptic number.

28574561240 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 28574561240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34138368000).

28574561240 is an abundant number, since it is smaller than the sum of its proper divisors (39702174760).

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

28574561240 is a wasteful number, since it uses less digits than its factorization.

28574561240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2977 (or 2973 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 28574561240 in words is "twenty-eight billion, five hundred seventy-four million, five hundred sixty-one thousand, two hundred forty".