28356349 has 6 divisors (see below), whose sum is σ = 32986014. Its totient is φ = 24305400.

The previous prime is 28356347. The next prime is 28356359. The reversal of 28356349 is 94365382.

It can be written as a sum of positive squares in only one way, i.e., 17347225 + 11009124 = 4165^2 + 3318^2 .

It is not a de Polignac number, because 28356349 - 2¹ = 28356347 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 (28356347) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289302 + ... + 289399.

It is an arithmetic number, because the mean of its divisors is an integer number (5497669).

Almost surely, 2^28356349 is an apocalyptic number.

It is an amenable number.

28356349 is a deficient number, since it is larger than the sum of its proper divisors (4629665).

28356349 is an equidigital number, since it uses as much as digits as its factorization.

28356349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578715 (or 578708 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The square root of 28356349 is about 5325.0679807867. The cubic root of 28356349 is about 304.9416676046.

The spelling of 28356349 in words is "twenty-eight million, three hundred fifty-six thousand, three hundred forty-nine".