420221436 has 48 divisors (see below), whose sum is σ = 1055244960. Its totient is φ = 129669120.

The previous prime is 420221411. The next prime is 420221441. The reversal of 420221436 is 634122024.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4441 + ... + 29328.

It is an arithmetic number, because the mean of its divisors is an integer number (21984270).

Almost surely, 2^420221436 is an apocalyptic number.

It is an amenable number.

420221436 is an abundant number, since it is smaller than the sum of its proper divisors (635023524).

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

420221436 is a wasteful number, since it uses less digits than its factorization.

420221436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33854 (or 33852 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 420221436 is about 20499.3033052345. The cubic root of 420221436 is about 749.0188271818.

The spelling of 420221436 in words is "four hundred twenty million, two hundred twenty-one thousand, four hundred thirty-six".