28239714 has 12 divisors (see below), whose sum is σ = 61186086. Its totient is φ = 9413232.

The previous prime is 28239713. The next prime is 28239727. The reversal of 28239714 is 41793282.

It can be written as a sum of positive squares in only one way, i.e., 14953689 + 13286025 = 3867^2 + 3645^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28239713) 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, 784419 + ... + 784454.

Almost surely, 2^28239714 is an apocalyptic number.

28239714 is an abundant number, since it is smaller than the sum of its proper divisors (32946372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28239714 is a wasteful number, since it uses less digits than its factorization.

28239714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568881 (or 1568878 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 28239714 is about 5314.1051927865. The cubic root of 28239714 is about 304.5229989019.

The spelling of 28239714 in words is "twenty-eight million, two hundred thirty-nine thousand, seven hundred fourteen".