420135766 has 8 divisors (see below), whose sum is σ = 632956320. Its totient is φ = 209150328.

The previous prime is 420135743. The next prime is 420135787. The reversal of 420135766 is 667531024.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458206 + ... + 459121.

It is an arithmetic number, because the mean of its divisors is an integer number (79119540).

Almost surely, 2^420135766 is an apocalyptic number.

420135766 is a deficient number, since it is larger than the sum of its proper divisors (212820554).

420135766 is a wasteful number, since it uses less digits than its factorization.

420135766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917558.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 420135766 is about 20497.2136155137. The cubic root of 420135766 is about 748.9679232230.

The spelling of 420135766 in words is "four hundred twenty million, one hundred thirty-five thousand, seven hundred sixty-six".