646454384 has 20 divisors (see below), whose sum is σ = 1262371584. Its totient is φ = 320681088.

The previous prime is 646454363. The next prime is 646454429. The reversal of 646454384 is 483454646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157037 + ... + 161100.

Almost surely, 2^646454384 is an apocalyptic number.

It is an amenable number.

646454384 is a deficient number, since it is larger than the sum of its proper divisors (615917200).

646454384 is a wasteful number, since it uses less digits than its factorization.

646454384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318272 (or 318266 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 44.

The square root of 646454384 is about 25425.4672326783. The cubic root of 646454384 is about 864.6611808556.

The spelling of 646454384 in words is "six hundred forty-six million, four hundred fifty-four thousand, three hundred eighty-four".