28039282 has 4 divisors (see below), whose sum is σ = 42058926. Its totient is φ = 14019640.

The previous prime is 28039261. The next prime is 28039289. The reversal of 28039282 is 28293082.

It is a happy number.

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., 15358561 + 12680721 = 3919^2 + 3561^2 .

It is not an unprimeable number, because it can be changed into a prime (28039289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7009819 + ... + 7009822.

Almost surely, 2^28039282 is an apocalyptic number.

28039282 is a deficient number, since it is larger than the sum of its proper divisors (14019644).

28039282 is a wasteful number, since it uses less digits than its factorization.

28039282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14019643.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28039282 is about 5295.2131213012. The cubic root of 28039282 is about 303.8008347464.

The spelling of 28039282 in words is "twenty-eight million, thirty-nine thousand, two hundred eighty-two".