28103998 has 8 divisors (see below), whose sum is σ = 45398808. Its totient is φ = 12971064.

The previous prime is 28103947. The next prime is 28104007. The reversal of 28103998 is 89930182.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28103998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540436 + ... + 540487.

It is an arithmetic number, because the mean of its divisors is an integer number (5674851).

Almost surely, 2^28103998 is an apocalyptic number.

28103998 is a deficient number, since it is larger than the sum of its proper divisors (17294810).

28103998 is a wasteful number, since it uses less digits than its factorization.

28103998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080938.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 28103998 is about 5301.3204015604. The cubic root of 28103998 is about 304.0343840956.

The spelling of 28103998 in words is "twenty-eight million, one hundred three thousand, nine hundred ninety-eight".