420864816 has 20 divisors (see below), whose sum is σ = 1087234232. Its totient is φ = 140288256.

The previous prime is 420864811. The next prime is 420864823. The reversal of 420864816 is 618468024.

It is not an unprimeable number, because it can be changed into a prime (420864811) by changing a digit.

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, 4383961 + ... + 4384056.

Almost surely, 2^420864816 is an apocalyptic number.

It is an amenable number.

420864816 is an abundant number, since it is smaller than the sum of its proper divisors (666369416).

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

420864816 is a wasteful number, since it uses less digits than its factorization.

420864816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8768028 (or 8768022 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 420864816 is about 20514.9900316817. The cubic root of 420864816 is about 749.4008940012.

The spelling of 420864816 in words is "four hundred twenty million, eight hundred sixty-four thousand, eight hundred sixteen".