28153439 has 2 divisors, whose sum is σ = 28153440. Its totient is φ = 28153438.

The previous prime is 28153427. The next prime is 28153451. The reversal of 28153439 is 93435182.

It is a balanced prime because it is at equal distance from previous prime (28153427) and next prime (28153451).

It is a cyclic number.

It is not a de Polignac number, because 28153439 - 2²⁰ = 27104863 is a prime.

It is a super-2 number, since 2×28153439² = 1585232255053442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28153399 and 28153408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28153409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14076719 + 14076720.

It is an arithmetic number, because the mean of its divisors is an integer number (14076720).

Almost surely, 2^28153439 is an apocalyptic number.

28153439 is a deficient number, since it is larger than the sum of its proper divisors (1).

28153439 is an equidigital number, since it uses as much as digits as its factorization.

28153439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 28153439 is about 5305.9814360776. The cubic root of 28153439 is about 304.2125670227.

The spelling of 28153439 in words is "twenty-eight million, one hundred fifty-three thousand, four hundred thirty-nine".