28443051 has 24 divisors (see below), whose sum is σ = 50566880. Its totient is φ = 15002496.

The previous prime is 28443049. The next prime is 28443059. The reversal of 28443051 is 15034482.

It is not a de Polignac number, because 28443051 - 2¹ = 28443049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28443059) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 16546 + ... + 18183.

Almost surely, 2^28443051 is an apocalyptic number.

28443051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28443051 is a deficient number, since it is larger than the sum of its proper divisors (22123829).

28443051 is a wasteful number, since it uses less digits than its factorization.

28443051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34755 (or 34752 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 28443051 is about 5333.2026963167. The cubic root of 28443051 is about 305.2521465921.

The spelling of 28443051 in words is "twenty-eight million, four hundred forty-three thousand, fifty-one".