646407422 has 16 divisors (see below), whose sum is σ = 1044051120. Its totient is φ = 299035008.

The previous prime is 646407413. The next prime is 646407431. The reversal of 646407422 is 224704646.

It is an interprime number because it is at equal distance from previous prime (646407413) and next prime (646407431).

It is a congruent number.

It is an unprimeable number.

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, 159113 + ... + 163124.

It is an arithmetic number, because the mean of its divisors is an integer number (65253195).

Almost surely, 2^646407422 is an apocalyptic number.

646407422 is a deficient number, since it is larger than the sum of its proper divisors (397643698).

646407422 is a wasteful number, since it uses less digits than its factorization.

646407422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322315.

The product of its (nonzero) digits is 64512, while the sum is 35.

The square root of 646407422 is about 25424.5436930538. The cubic root of 646407422 is about 864.6402424348.

The spelling of 646407422 in words is "six hundred forty-six million, four hundred seven thousand, four hundred twenty-two".