420565838 has 16 divisors (see below), whose sum is σ = 786513024. Its totient is φ = 163856760.

The previous prime is 420565837. The next prime is 420565841. The reversal of 420565838 is 838565024.

It is a junction number, because it is equal to n+sod(n) for n = 420565795 and 420565804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420565837) 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 7 ways as a sum of consecutive naturals, for example, 1365320 + ... + 1365627.

It is an arithmetic number, because the mean of its divisors is an integer number (49157064).

Almost surely, 2^420565838 is an apocalyptic number.

420565838 is a deficient number, since it is larger than the sum of its proper divisors (365947186).

420565838 is a wasteful number, since it uses less digits than its factorization.

420565838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730967.

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 420565838 is about 20507.7019190352. The cubic root of 420565838 is about 749.2233964230.

The spelling of 420565838 in words is "four hundred twenty million, five hundred sixty-five thousand, eight hundred thirty-eight".