28103938 has 8 divisors (see below), whose sum is σ = 42181632. Its totient is φ = 14043396.

The previous prime is 28103909. The next prime is 28103947. The reversal of 28103938 is 83930182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28103938² = 1579662662215688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1231 + ... + 7597.

It is an arithmetic number, because the mean of its divisors is an integer number (5272704).

Almost surely, 2^28103938 is an apocalyptic number.

28103938 is a deficient number, since it is larger than the sum of its proper divisors (14077694).

28103938 is a wasteful number, since it uses less digits than its factorization.

28103938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8576.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 28103938 is about 5301.3147425898. The cubic root of 28103938 is about 304.0341677316.

The spelling of 28103938 in words is "twenty-eight million, one hundred three thousand, nine hundred thirty-eight".