28951103 has 4 divisors (see below), whose sum is σ = 28977408. Its totient is φ = 28924800.

The previous prime is 28951081. The next prime is 28951127. The reversal of 28951103 is 30115982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28951103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28951603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11426 + ... + 13727.

It is an arithmetic number, because the mean of its divisors is an integer number (7244352).

Almost surely, 2^28951103 is an apocalyptic number.

28951103 is a deficient number, since it is larger than the sum of its proper divisors (26305).

28951103 is a wasteful number, since it uses less digits than its factorization.

28951103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26304.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 28951103 is about 5380.6229193282. The cubic root of 28951103 is about 307.0589106286.

The spelling of 28951103 in words is "twenty-eight million, nine hundred fifty-one thousand, one hundred three".