28140903 has 24 divisors (see below), whose sum is σ = 46609056. Its totient is φ = 16027200.

The previous prime is 28140887. The next prime is 28140907. The reversal of 28140903 is 30904182.

It is not a de Polignac number, because 28140903 - 2⁴ = 28140887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28140907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25993 + ... + 27053.

It is an arithmetic number, because the mean of its divisors is an integer number (1942044).

Almost surely, 2^28140903 is an apocalyptic number.

28140903 is a deficient number, since it is larger than the sum of its proper divisors (18468153).

28140903 is a wasteful number, since it uses less digits than its factorization.

28140903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28140903 is about 5304.7999962298. The cubic root of 28140903 is about 304.1674076502.

The spelling of 28140903 in words is "twenty-eight million, one hundred forty thousand, nine hundred three".