28803843 has 20 divisors (see below), whose sum is σ = 44901648. Its totient is φ = 18366480.

The previous prime is 28803833. The next prime is 28803869. The reversal of 28803843 is 34830882.

It is a happy number.

It is not a de Polignac number, because 28803843 - 2⁵ = 28803811 is a prime.

It is a super-2 number, since 2×28803843² = 1659322743137298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28803798 and 28803807.

It is not an unprimeable number, because it can be changed into a prime (28803823) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5868 + ... + 9593.

Almost surely, 2^28803843 is an apocalyptic number.

28803843 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28803843 is a deficient number, since it is larger than the sum of its proper divisors (16097805).

28803843 is a wasteful number, since it uses less digits than its factorization.

28803843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15496 (or 15487 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 28803843 is about 5366.9211844409. The cubic root of 28803843 is about 306.5374062730.

It can be divided in two parts, 28803 and 843, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 28803843 in words is "twenty-eight million, eight hundred three thousand, eight hundred forty-three".