420706646 has 8 divisors (see below), whose sum is σ = 636849840. Its totient is φ = 208423368.

The previous prime is 420706609. The next prime is 420706669. The reversal of 420706646 is 646607024.

It is a happy number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964706 + ... + 965141.

It is an arithmetic number, because the mean of its divisors is an integer number (79606230).

Almost surely, 2^420706646 is an apocalyptic number.

420706646 is a deficient number, since it is larger than the sum of its proper divisors (216143194).

420706646 is a wasteful number, since it uses less digits than its factorization.

420706646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929958.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 420706646 is about 20511.1346833860. The cubic root of 420706646 is about 749.3070019429.

The spelling of 420706646 in words is "four hundred twenty million, seven hundred six thousand, six hundred forty-six".