420139216 has 20 divisors (see below), whose sum is σ = 930308512. Its totient is φ = 180059616.

The previous prime is 420139193. The next prime is 420139273. The reversal of 420139216 is 612931024.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1875510 + ... + 1875733.

Almost surely, 2^420139216 is an apocalyptic number.

It is an amenable number.

420139216 is an abundant number, since it is smaller than the sum of its proper divisors (510169296).

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

420139216 is a wasteful number, since it uses less digits than its factorization.

420139216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751258 (or 3751252 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 420139216 is about 20497.2977731212. The cubic root of 420139216 is about 748.9699733002.

The spelling of 420139216 in words is "four hundred twenty million, one hundred thirty-nine thousand, two hundred sixteen".