420892818 has 16 divisors (see below), whose sum is σ = 849509760. Its totient is φ = 139010256.

The previous prime is 420892811. The next prime is 420892819. The reversal of 420892818 is 818298024.

It is a super-2 number, since 2×420892818² = 354301528487962248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420892818.

It is not an unprimeable number, because it can be changed into a prime (420892811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321130 + ... + 322437.

It is an arithmetic number, because the mean of its divisors is an integer number (53094360).

Almost surely, 2^420892818 is an apocalyptic number.

420892818 is an abundant number, since it is smaller than the sum of its proper divisors (428616942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420892818 is a wasteful number, since it uses less digits than its factorization.

420892818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643681.

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 420892818 is about 20515.6724968986. The cubic root of 420892818 is about 749.4175139527.

The spelling of 420892818 in words is "four hundred twenty million, eight hundred ninety-two thousand, eight hundred eighteen".