28046439 has 8 divisors (see below), whose sum is σ = 41550320. Its totient is φ = 18697608.

The previous prime is 28046437. The next prime is 28046441. The reversal of 28046439 is 93464082.

It is a happy number.

28046439 is a `hidden beast` number, since 2 + 8 + 0 + 4 + 643 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (28046437) and next prime (28046441).

It is not a de Polignac number, because 28046439 - 2¹ = 28046437 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 (28046437) 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, 519352 + ... + 519405.

It is an arithmetic number, because the mean of its divisors is an integer number (5193790).

Almost surely, 2^28046439 is an apocalyptic number.

28046439 is a deficient number, since it is larger than the sum of its proper divisors (13503881).

28046439 is a wasteful number, since it uses less digits than its factorization.

28046439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038766 (or 1038760 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 28046439 is about 5295.8888772330. Note that the first 4 decimals coincide. The cubic root of 28046439 is about 303.8266808386.

The spelling of 28046439 in words is "twenty-eight million, forty-six thousand, four hundred thirty-nine".