28039351 has 4 divisors (see below), whose sum is σ = 28165312. Its totient is φ = 27913392.

The previous prime is 28039343. The next prime is 28039387. The reversal of 28039351 is 15393082.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28039351 - 2³ = 28039343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28039331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62646 + ... + 63091.

It is an arithmetic number, because the mean of its divisors is an integer number (7041328).

Almost surely, 2^28039351 is an apocalyptic number.

28039351 is a deficient number, since it is larger than the sum of its proper divisors (125961).

28039351 is a wasteful number, since it uses less digits than its factorization.

28039351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125960.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 28039351 is about 5295.2196366157. The cubic root of 28039351 is about 303.8010839473.

The spelling of 28039351 in words is "twenty-eight million, thirty-nine thousand, three hundred fifty-one".