420136646 has 8 divisors (see below), whose sum is σ = 640536384. Its totient is φ = 206624520.

The previous prime is 420136637. The next prime is 420136663. The reversal of 420136646 is 646631024.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1721750 + ... + 1721993.

It is an arithmetic number, because the mean of its divisors is an integer number (80067048).

Almost surely, 2^420136646 is an apocalyptic number.

420136646 is a deficient number, since it is larger than the sum of its proper divisors (220399738).

420136646 is a wasteful number, since it uses less digits than its factorization.

420136646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3443806.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 420136646 is about 20497.2350818348. The cubic root of 420136646 is about 748.9684461423.

The spelling of 420136646 in words is "four hundred twenty million, one hundred thirty-six thousand, six hundred forty-six".