28313943 has 48 divisors (see below), whose sum is σ = 47282688. Its totient is φ = 14731200.

The previous prime is 28313941. The next prime is 28313963. The reversal of 28313943 is 34931382.

It is a happy number.

It is not a de Polignac number, because 28313943 - 2¹ = 28313941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28313941) 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 47 ways as a sum of consecutive naturals, for example, 464133 + ... + 464193.

It is an arithmetic number, because the mean of its divisors is an integer number (985056).

Almost surely, 2^28313943 is an apocalyptic number.

28313943 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28313943 is a deficient number, since it is larger than the sum of its proper divisors (18968745).

28313943 is a wasteful number, since it uses less digits than its factorization.

28313943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 125 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 28313943 is about 5321.0847578290. The cubic root of 28313943 is about 304.7895816425.

The spelling of 28313943 in words is "twenty-eight million, three hundred thirteen thousand, nine hundred forty-three".