28103236 has 24 divisors (see below), whose sum is σ = 58021376. Its totient is φ = 11655360.

The previous prime is 28103203. The next prime is 28103269. The reversal of 28103236 is 63230182.

It is an interprime number because it is at equal distance from previous prime (28103203) and next prime (28103269).

It is a self number, because there is not a number n which added to its sum of digits gives 28103236.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 15321 + ... + 17056.

Almost surely, 2^28103236 is an apocalyptic number.

It is an amenable number.

28103236 is an abundant number, since it is smaller than the sum of its proper divisors (29918140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28103236 is a wasteful number, since it uses less digits than its factorization.

28103236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32419 (or 32417 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 28103236 is about 5301.2485321856. The cubic root of 28103236 is about 304.0316362505.

The spelling of 28103236 in words is "twenty-eight million, one hundred three thousand, two hundred thirty-six".