28119100 has 18 divisors (see below), whose sum is σ = 61018664. Its totient is φ = 11247600.

The previous prime is 28119083. The next prime is 28119121. The reversal of 28119100 is 191182.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140496 + ... + 140695.

Almost surely, 2^28119100 is an apocalyptic number.

28119100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28119100 is an abundant number, since it is smaller than the sum of its proper divisors (32899564).

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

28119100 is a wasteful number, since it uses less digits than its factorization.

28119100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281205 (or 281198 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 28119100 is about 5302.7445723889. The cubic root of 28119100 is about 304.0888331112.

It can be divided in two parts, 2811 and 9100, that added together give a palindrome (11911).

The spelling of 28119100 in words is "twenty-eight million, one hundred nineteen thousand, one hundred".