28119500 has 24 divisors (see below), whose sum is σ = 61414080. Its totient is φ = 11247600.

The previous prime is 28119439. The next prime is 28119517. The reversal of 28119500 is 591182.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28119500.

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, 27620 + ... + 28619.

It is an arithmetic number, because the mean of its divisors is an integer number (2558920).

Almost surely, 2^28119500 is an apocalyptic number.

28119500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28119500 is an abundant number, since it is smaller than the sum of its proper divisors (33294580).

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

28119500 is a wasteful number, since it uses less digits than its factorization.

28119500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56258 (or 56246 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 28119500 is about 5302.7822885727. The cubic root of 28119500 is about 304.0902750132.

The spelling of 28119500 in words is "twenty-eight million, one hundred nineteen thousand, five hundred".