28538239560 has 32 divisors (see below), whose sum is σ = 85614719040. Its totient is φ = 7610197184.

The previous prime is 28538239537. The next prime is 28538239607. The reversal of 28538239560 is 6593283582.

It is a super-2 number, since 2×28538239560² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118909212 + ... + 118909451.

It is an arithmetic number, because the mean of its divisors is an integer number (2675459970).

Almost surely, 2^28538239560 is an apocalyptic number.

28538239560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28538239560 is an abundant number, since it is smaller than the sum of its proper divisors (57076479480).

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

28538239560 is a wasteful number, since it uses less digits than its factorization.

28538239560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237818677 (or 237818673 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 28538239560 in words is "twenty-eight billion, five hundred thirty-eight million, two hundred thirty-nine thousand, five hundred sixty".