420770643 has 8 divisors (see below), whose sum is σ = 561248256. Its totient is φ = 280403400.

The previous prime is 420770641. The next prime is 420770663. The reversal of 420770643 is 346077024.

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

It is not a de Polignac number, because 420770643 - 2¹ = 420770641 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (420770641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18243 + ... + 34268.

It is an arithmetic number, because the mean of its divisors is an integer number (70156032).

Almost surely, 2^420770643 is an apocalyptic number.

420770643 is a deficient number, since it is larger than the sum of its proper divisors (140477613).

420770643 is a wasteful number, since it uses less digits than its factorization.

420770643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55185.

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 420770643 is about 20512.6946791493. The cubic root of 420770643 is about 749.3449943455.

The spelling of 420770643 in words is "four hundred twenty million, seven hundred seventy thousand, six hundred forty-three".