56420309 has 8 divisors (see below), whose sum is σ = 61604928. Its totient is φ = 51244960.

The previous prime is 56420293. The next prime is 56420321. The reversal of 56420309 is 90302465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56420309 - 2⁴ = 56420293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56420339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18929 + ... + 21705.

It is an arithmetic number, because the mean of its divisors is an integer number (7700616).

Almost surely, 2^56420309 is an apocalyptic number.

It is an amenable number.

56420309 is a deficient number, since it is larger than the sum of its proper divisors (5184619).

56420309 is a wasteful number, since it uses less digits than its factorization.

56420309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 56420309 is about 7511.3453521989. The cubic root of 56420309 is about 383.5410210831.

The spelling of 56420309 in words is "fifty-six million, four hundred twenty thousand, three hundred nine".