56428439 has 2 divisors, whose sum is σ = 56428440. Its totient is φ = 56428438.

The previous prime is 56428429. The next prime is 56428459. The reversal of 56428439 is 93482465.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56428439 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56428396 and 56428405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56428409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28214219 + 28214220.

It is an arithmetic number, because the mean of its divisors is an integer number (28214220).

Almost surely, 2^56428439 is an apocalyptic number.

56428439 is a deficient number, since it is larger than the sum of its proper divisors (1).

56428439 is an equidigital number, since it uses as much as digits as its factorization.

56428439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 41.

The square root of 56428439 is about 7511.8865140522. The cubic root of 56428439 is about 383.5594425746.

The spelling of 56428439 in words is "fifty-six million, four hundred twenty-eight thousand, four hundred thirty-nine".