28487439 has 6 divisors (see below), whose sum is σ = 41148536. Its totient is φ = 18991620.

The previous prime is 28487429. The next prime is 28487443. The reversal of 28487439 is 93478482.

It is not a de Polignac number, because 28487439 - 2⁴ = 28487423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28487394 and 28487403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28487429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1582627 + ... + 1582644.

Almost surely, 2^28487439 is an apocalyptic number.

28487439 is a deficient number, since it is larger than the sum of its proper divisors (12661097).

28487439 is a wasteful number, since it uses less digits than its factorization.

28487439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165277 (or 3165274 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 28487439 is about 5337.3625509234. The cubic root of 28487439 is about 305.4108554211.

The spelling of 28487439 in words is "twenty-eight million, four hundred eighty-seven thousand, four hundred thirty-nine".