28350361 has 4 divisors (see below), whose sum is σ = 30531172. Its totient is φ = 26169552.

The previous prime is 28350359. The next prime is 28350367. The reversal of 28350361 is 16305382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3400336 + 24950025 = 1844^2 + 4995^2 .

It is a cyclic number.

It is not a de Polignac number, because 28350361 - 2¹ = 28350359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28350367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090386 + ... + 1090411.

It is an arithmetic number, because the mean of its divisors is an integer number (7632793).

Almost surely, 2^28350361 is an apocalyptic number.

It is an amenable number.

28350361 is a deficient number, since it is larger than the sum of its proper divisors (2180811).

28350361 is a wasteful number, since it uses less digits than its factorization.

28350361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180810.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 28350361 is about 5324.5057047580. The cubic root of 28350361 is about 304.9202012862.

The spelling of 28350361 in words is "twenty-eight million, three hundred fifty thousand, three hundred sixty-one".