28254439 has 8 divisors (see below), whose sum is σ = 29387520. Its totient is φ = 27132000.

The previous prime is 28254403. The next prime is 28254449. The reversal of 28254439 is 93445282.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28254439 - 2¹³ = 28246247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28254398 and 28254407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28254449) 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, 2989 + ... + 8089.

It is an arithmetic number, because the mean of its divisors is an integer number (3673440).

Almost surely, 2^28254439 is an apocalyptic number.

28254439 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28254439 is a deficient number, since it is larger than the sum of its proper divisors (1133081).

28254439 is a wasteful number, since it uses less digits than its factorization.

28254439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321.

The product of its digits is 69120, while the sum is 37.

The square root of 28254439 is about 5315.4904759580. The cubic root of 28254439 is about 304.5759187249.

The spelling of 28254439 in words is "twenty-eight million, two hundred fifty-four thousand, four hundred thirty-nine".