28071019240 has 32 divisors (see below), whose sum is σ = 68901593760. Its totient is φ = 10207643200.

The previous prime is 28071019211. The next prime is 28071019309. The reversal of 28071019240 is 4291017082.

It is a junction number, because it is equal to n+sod(n) for n = 28071019196 and 28071019205.

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, 31898446 + ... + 31899325.

It is an arithmetic number, because the mean of its divisors is an integer number (2153174805).

Almost surely, 2^28071019240 is an apocalyptic number.

28071019240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28071019240 is an abundant number, since it is smaller than the sum of its proper divisors (40830574520).

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

28071019240 is a wasteful number, since it uses less digits than its factorization.

28071019240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63797793 (or 63797789 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 28071019240 in words is "twenty-eight billion, seventy-one million, nineteen thousand, two hundred forty".