420991064 has 16 divisors (see below), whose sum is σ = 850078320. Its totient is φ = 194303520.

The previous prime is 420991063. The next prime is 420991121. The reversal of 420991064 is 460199024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420991063) 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, 2023892 + ... + 2024099.

It is an arithmetic number, because the mean of its divisors is an integer number (53129895).

Almost surely, 2^420991064 is an apocalyptic number.

It is an amenable number.

420991064 is an abundant number, since it is smaller than the sum of its proper divisors (429087256).

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

420991064 is a wasteful number, since it uses less digits than its factorization.

420991064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048010 (or 4048006 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 420991064 is about 20518.0667705318. The cubic root of 420991064 is about 749.4758198063.

The spelling of 420991064 in words is "four hundred twenty million, nine hundred ninety-one thousand, sixty-four".