28519100 has 18 divisors (see below), whose sum is σ = 61886664. Its totient is φ = 11407600.

The previous prime is 28519097. The next prime is 28519109. The reversal of 28519100 is 191582.

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 28519100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28519109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142496 + ... + 142695.

It is an arithmetic number, because the mean of its divisors is an integer number (3438148).

Almost surely, 2^28519100 is an apocalyptic number.

28519100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28519100 is an abundant number, since it is smaller than the sum of its proper divisors (33367564).

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

28519100 is a wasteful number, since it uses less digits than its factorization.

28519100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285205 (or 285198 counting only the distinct ones).

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

The square root of 28519100 is about 5340.3277053005. The cubic root of 28519100 is about 305.5239582876.

The spelling of 28519100 in words is "twenty-eight million, five hundred nineteen thousand, one hundred".