28484839 has 2 divisors, whose sum is σ = 28484840. Its totient is φ = 28484838.

The previous prime is 28484837. The next prime is 28484851. The reversal of 28484839 is 93848482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28484839 - 2¹ = 28484837 is a prime.

It is a super-2 number, since 2×28484839² = 1622772105711842, which contains 22 as substring.

Together with 28484837, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28484831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14242419 + 14242420.

It is an arithmetic number, because the mean of its divisors is an integer number (14242420).

Almost surely, 2^28484839 is an apocalyptic number.

28484839 is a deficient number, since it is larger than the sum of its proper divisors (1).

28484839 is an equidigital number, since it uses as much as digits as its factorization.

28484839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 46.

The square root of 28484839 is about 5337.1189793745. The cubic root of 28484839 is about 305.4015636957.

The spelling of 28484839 in words is "twenty-eight million, four hundred eighty-four thousand, eight hundred thirty-nine".