28916943 has 24 divisors (see below), whose sum is σ = 43545264. Its totient is φ = 17043840.

The previous prime is 28916929. The next prime is 28916963. The reversal of 28916943 is 34961982.

It is not a de Polignac number, because 28916943 - 2¹⁰ = 28915919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28916895 and 28916904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28916963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12355 + ... + 14507.

It is an arithmetic number, because the mean of its divisors is an integer number (1814386).

Almost surely, 2^28916943 is an apocalyptic number.

28916943 is a deficient number, since it is larger than the sum of its proper divisors (14628321).

28916943 is a wasteful number, since it uses less digits than its factorization.

28916943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215 (or 2204 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 28916943 is about 5377.4476287547. The cubic root of 28916943 is about 306.9380947304.

The spelling of 28916943 in words is "twenty-eight million, nine hundred sixteen thousand, nine hundred forty-three".