28977439 has 2 divisors, whose sum is σ = 28977440. Its totient is φ = 28977438.

The previous prime is 28977391. The next prime is 28977449. The reversal of 28977439 is 93477982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28977439 - 2¹¹ = 28975391 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28977392 and 28977401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28977449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14488719 + 14488720.

It is an arithmetic number, because the mean of its divisors is an integer number (14488720).

Almost surely, 2^28977439 is an apocalyptic number.

28977439 is a deficient number, since it is larger than the sum of its proper divisors (1).

28977439 is an equidigital number, since it uses as much as digits as its factorization.

28977439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 49.

The square root of 28977439 is about 5383.0696633055. The cubic root of 28977439 is about 307.1519900140.

The spelling of 28977439 in words is "twenty-eight million, nine hundred seventy-seven thousand, four hundred thirty-nine".