28124877540 has 48 divisors (see below), whose sum is σ = 79634499840. Its totient is φ = 7415696640.

The previous prime is 28124877493. The next prime is 28124877541. The reversal of 28124877540 is 4577842182.

It is a self number, because there is not a number n which added to its sum of digits gives 28124877540.

It is not an unprimeable number, because it can be changed into a prime (28124877541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2628076 + ... + 2638755.

It is an arithmetic number, because the mean of its divisors is an integer number (1659052080).

Almost surely, 2^28124877540 is an apocalyptic number.

28124877540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28124877540 is an abundant number, since it is smaller than the sum of its proper divisors (51509622300).

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

28124877540 is a wasteful number, since it uses less digits than its factorization.

28124877540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5266932 (or 5266930 counting only the distinct ones).

The product of its (nonzero) digits is 1003520, while the sum is 48.

The spelling of 28124877540 in words is "twenty-eight billion, one hundred twenty-four million, eight hundred seventy-seven thousand, five hundred forty".