420009770 has 16 divisors (see below), whose sum is σ = 758485728. Its totient is φ = 167455440.

The previous prime is 420009679. The next prime is 420009817. The reversal of 420009770 is 77900024.

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 7 ways as a sum of consecutive naturals, for example, 65336 + ... + 71475.

It is an arithmetic number, because the mean of its divisors is an integer number (47405358).

Almost surely, 2^420009770 is an apocalyptic number.

420009770 is a deficient number, since it is larger than the sum of its proper divisors (338475958).

420009770 is a wasteful number, since it uses less digits than its factorization.

420009770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137125.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 420009770 is about 20494.1398941258. The cubic root of 420009770 is about 748.8930455247.

Adding to 420009770 its reverse (77900024), we get a palindrome (497909794).

The spelling of 420009770 in words is "four hundred twenty million, nine thousand, seven hundred seventy".