28103870 has 16 divisors (see below), whose sum is σ = 50869728. Its totient is φ = 11178720.

The previous prime is 28103863. The next prime is 28103879. The reversal of 28103870 is 7830182.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28103879) 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, 5954 + ... + 9573.

It is an arithmetic number, because the mean of its divisors is an integer number (3179358).

Almost surely, 2^28103870 is an apocalyptic number.

28103870 is a deficient number, since it is larger than the sum of its proper divisors (22765858).

28103870 is a wasteful number, since it uses less digits than its factorization.

28103870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15715.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 28103870 is about 5301.3083290825. The cubic root of 28103870 is about 304.0339225188.

The spelling of 28103870 in words is "twenty-eight million, one hundred three thousand, eight hundred seventy".