420787946 has 32 divisors (see below), whose sum is σ = 673686720. Its totient is φ = 196560000.

The previous prime is 420787919. The next prime is 420787949. The reversal of 420787946 is 649787024.

It is a self number, because there is not a number n which added to its sum of digits gives 420787946.

It is not an unprimeable number, because it can be changed into a prime (420787949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1497326 + ... + 1497606.

It is an arithmetic number, because the mean of its divisors is an integer number (21052710).

Almost surely, 2^420787946 is an apocalyptic number.

420787946 is a deficient number, since it is larger than the sum of its proper divisors (252898774).

420787946 is a wasteful number, since it uses less digits than its factorization.

420787946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 420787946 is about 20513.1164380257. The cubic root of 420787946 is about 749.3552657677.

The spelling of 420787946 in words is "four hundred twenty million, seven hundred eighty-seven thousand, nine hundred forty-six".