28439337 has 8 divisors (see below), whose sum is σ = 37969120. Its totient is φ = 18934560.

The previous prime is 28439329. The next prime is 28439353. The reversal of 28439337 is 73393482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28439337 - 2³ = 28439329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28439295 and 28439304.

It is not an unprimeable number, because it can be changed into a prime (28439377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3412 + ... + 8277.

It is an arithmetic number, because the mean of its divisors is an integer number (4746140).

Almost surely, 2^28439337 is an apocalyptic number.

It is an amenable number.

28439337 is a deficient number, since it is larger than the sum of its proper divisors (9529783).

28439337 is a wasteful number, since it uses less digits than its factorization.

28439337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12503.

The product of its digits is 108864, while the sum is 39.

The square root of 28439337 is about 5332.8544889205. The cubic root of 28439337 is about 305.2388597402.

It can be divided in two parts, 284 and 39337, that added together give a triangular number (39621 = T₂₈₁).

The spelling of 28439337 in words is "twenty-eight million, four hundred thirty-nine thousand, three hundred thirty-seven".