28334643 has 16 divisors (see below), whose sum is σ = 41498880. Its totient is φ = 17116704.

The previous prime is 28334639. The next prime is 28334671. The reversal of 28334643 is 34643382.

It is not a de Polignac number, because 28334643 - 2² = 28334639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28334633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9496 + ... + 12117.

It is an arithmetic number, because the mean of its divisors is an integer number (2593680).

Almost surely, 2^28334643 is an apocalyptic number.

28334643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28334643 is a deficient number, since it is larger than the sum of its proper divisors (13164237).

28334643 is a wasteful number, since it uses less digits than its factorization.

28334643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21658.

The product of its digits is 41472, while the sum is 33.

The square root of 28334643 is about 5323.0294945642. The cubic root of 28334643 is about 304.8638396085.

The spelling of 28334643 in words is "twenty-eight million, three hundred thirty-four thousand, six hundred forty-three".