56280439 has 2 divisors, whose sum is σ = 56280440. Its totient is φ = 56280438.

The previous prime is 56280403. The next prime is 56280443. The reversal of 56280439 is 93408265.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56280439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56280398 and 56280407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56280139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28140219 + 28140220.

It is an arithmetic number, because the mean of its divisors is an integer number (28140220).

Almost surely, 2^56280439 is an apocalyptic number.

56280439 is a deficient number, since it is larger than the sum of its proper divisors (1).

56280439 is an equidigital number, since it uses as much as digits as its factorization.

56280439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 56280439 is about 7502.0289922127. The cubic root of 56280439 is about 383.2238168978.

The spelling of 56280439 in words is "fifty-six million, two hundred eighty thousand, four hundred thirty-nine".