28104380 has 24 divisors (see below), whose sum is σ = 59421600. Its totient is φ = 11165120.

The previous prime is 28104379. The next prime is 28104389. The reversal of 28104380 is 8340182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28104389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1736 + ... + 7695.

It is an arithmetic number, because the mean of its divisors is an integer number (2475900).

Almost surely, 2^28104380 is an apocalyptic number.

28104380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28104380 is an abundant number, since it is smaller than the sum of its proper divisors (31317220).

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

28104380 is a wasteful number, since it uses less digits than its factorization.

28104380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9589 (or 9587 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 28104380 is about 5301.3564301978. The cubic root of 28104380 is about 304.0357616055.

The spelling of 28104380 in words is "twenty-eight million, one hundred four thousand, three hundred eighty".