28539479 has 2 divisors, whose sum is σ = 28539480. Its totient is φ = 28539478.

The previous prime is 28539449. The next prime is 28539503. The reversal of 28539479 is 97493582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28539479 - 2¹² = 28535383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28539409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14269739 + 14269740.

It is an arithmetic number, because the mean of its divisors is an integer number (14269740).

Almost surely, 2^28539479 is an apocalyptic number.

28539479 is a deficient number, since it is larger than the sum of its proper divisors (1).

28539479 is an equidigital number, since it uses as much as digits as its factorization.

28539479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 28539479 is about 5342.2353935408. The cubic root of 28539479 is about 305.5967140933.

The spelling of 28539479 in words is "twenty-eight million, five hundred thirty-nine thousand, four hundred seventy-nine".