420844855 has 8 divisors (see below), whose sum is σ = 505247472. Its totient is φ = 336520128.

The previous prime is 420844849. The next prime is 420844867. The reversal of 420844855 is 558448024.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 420844855 - 2³ = 420844847 is a prime.

It is a super-2 number, since 2×420844855² = 354220783959942050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6837 + ... + 29806.

It is an arithmetic number, because the mean of its divisors is an integer number (63155934).

Almost surely, 2^420844855 is an apocalyptic number.

420844855 is a deficient number, since it is larger than the sum of its proper divisors (84402617).

420844855 is a wasteful number, since it uses less digits than its factorization.

420844855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38945.

The product of its (nonzero) digits is 204800, while the sum is 40.

The square root of 420844855 is about 20514.5035279921. The cubic root of 420844855 is about 749.3890461527.

The spelling of 420844855 in words is "four hundred twenty million, eight hundred forty-four thousand, eight hundred fifty-five".