420662643 has 32 divisors (see below), whose sum is σ = 588736512. Its totient is φ = 266947200.

The previous prime is 420662639. The next prime is 420662681. The reversal of 420662643 is 346266024.

It is not a de Polignac number, because 420662643 - 2² = 420662639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420662623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1352458 + ... + 1352768.

It is an arithmetic number, because the mean of its divisors is an integer number (18398016).

Almost surely, 2^420662643 is an apocalyptic number.

420662643 is a deficient number, since it is larger than the sum of its proper divisors (168073869).

420662643 is a wasteful number, since it uses less digits than its factorization.

420662643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595.

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 420662643 is about 20510.0619940555. The cubic root of 420662643 is about 749.2808769253.

The spelling of 420662643 in words is "four hundred twenty million, six hundred sixty-two thousand, six hundred forty-three".