28334357 has 4 divisors (see below), whose sum is σ = 28346700. Its totient is φ = 28322016.

The previous prime is 28334353. The next prime is 28334381. The reversal of 28334357 is 75343382.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75343382 = 2 ⋅37671691.

It can be written as a sum of positive squares in 2 ways, for example, as 2588881 + 25745476 = 1609^2 + 5074^2 .

It is a cyclic number.

It is not a de Polignac number, because 28334357 - 2² = 28334353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28334351) 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 3 ways as a sum of consecutive naturals, for example, 1598 + ... + 7695.

It is an arithmetic number, because the mean of its divisors is an integer number (7086675).

Almost surely, 2^28334357 is an apocalyptic number.

It is an amenable number.

28334357 is a deficient number, since it is larger than the sum of its proper divisors (12343).

28334357 is an equidigital number, since it uses as much as digits as its factorization.

28334357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12342.

The product of its digits is 60480, while the sum is 35.

The square root of 28334357 is about 5323.0026300952. The cubic root of 28334357 is about 304.8628138753.

The spelling of 28334357 in words is "twenty-eight million, three hundred thirty-four thousand, three hundred fifty-seven".