28039294 has 4 divisors (see below), whose sum is σ = 42058944. Its totient is φ = 14019646.

The previous prime is 28039289. The next prime is 28039313. The reversal of 28039294 is 49293082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49293082 = 2 ⋅24646541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7009822 + ... + 7009825.

It is an arithmetic number, because the mean of its divisors is an integer number (10514736).

Almost surely, 2^28039294 is an apocalyptic number.

28039294 is a deficient number, since it is larger than the sum of its proper divisors (14019650).

28039294 is a wasteful number, since it uses less digits than its factorization.

28039294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14019649.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 28039294 is about 5295.2142543999. The cubic root of 28039294 is about 303.8008780857.

The spelling of 28039294 in words is "twenty-eight million, thirty-nine thousand, two hundred ninety-four".