28214842 has 4 divisors (see below), whose sum is σ = 42322266. Its totient is φ = 14107420.

The previous prime is 28214833. The next prime is 28214843. The reversal of 28214842 is 24841282.

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

It can be written as a sum of positive squares in only one way, i.e., 14753281 + 13461561 = 3841^2 + 3669^2 .

It is not an unprimeable number, because it can be changed into a prime (28214843) 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 as a sum of consecutive naturals, namely, 7053709 + ... + 7053712.

Almost surely, 2^28214842 is an apocalyptic number.

28214842 is a deficient number, since it is larger than the sum of its proper divisors (14107424).

28214842 is a wasteful number, since it uses less digits than its factorization.

28214842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14107423.

The product of its digits is 8192, while the sum is 31.

The square root of 28214842 is about 5311.7644902612. The cubic root of 28214842 is about 304.4335702255.

The spelling of 28214842 in words is "twenty-eight million, two hundred fourteen thousand, eight hundred forty-two".