28264515540 has 48 divisors (see below), whose sum is σ = 82581545088. Its totient is φ = 7209499264.

The previous prime is 28264515533. The next prime is 28264515541. The reversal of 28264515540 is 4551546282.

It is a junction number, because it is equal to n+sod(n) for n = 28264515492 and 28264515501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28264515541) 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 15 ways as a sum of consecutive naturals, for example, 10239387 + ... + 10242146.

It is an arithmetic number, because the mean of its divisors is an integer number (1720448856).

Almost surely, 2^28264515540 is an apocalyptic number.

28264515540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28264515540 is an abundant number, since it is smaller than the sum of its proper divisors (54317029548).

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

28264515540 is a wasteful number, since it uses less digits than its factorization.

28264515540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20481568 (or 20481566 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 42.

The spelling of 28264515540 in words is "twenty-eight billion, two hundred sixty-four million, five hundred fifteen thousand, five hundred forty".