28243103100 has 72 divisors (see below), whose sum is σ = 81734904048. Its totient is φ = 7529817600.

The previous prime is 28243103099. The next prime is 28243103111. The reversal of 28243103100 is 130134282.

It is a super-2 number, since 2×28243103100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1949082 + ... + 1963518.

Almost surely, 2^28243103100 is an apocalyptic number.

28243103100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28243103100 is an abundant number, since it is smaller than the sum of its proper divisors (53491800948).

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

28243103100 is a wasteful number, since it uses less digits than its factorization.

28243103100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20975 (or 20968 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 28243103100 its reverse (130134282), we get a palindrome (28373237382).

The spelling of 28243103100 in words is "twenty-eight billion, two hundred forty-three million, one hundred three thousand, one hundred".