28103930 has 32 divisors (see below), whose sum is σ = 53561088. Its totient is φ = 10595200.

The previous prime is 28103909. The next prime is 28103947. The reversal of 28103930 is 3930182.

It is a self number, because there is not a number n which added to its sum of digits gives 28103930.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15470 + ... + 17190.

It is an arithmetic number, because the mean of its divisors is an integer number (1673784).

Almost surely, 2^28103930 is an apocalyptic number.

28103930 is a deficient number, since it is larger than the sum of its proper divisors (25457158).

28103930 is a wasteful number, since it uses less digits than its factorization.

28103930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 28103930 is about 5301.3139880599. The cubic root of 28103930 is about 304.0341388831.

The spelling of 28103930 in words is "twenty-eight million, one hundred three thousand, nine hundred thirty".