420181944 has 64 divisors (see below), whose sum is σ = 1292874240. Its totient is φ = 110816640.

The previous prime is 420181921. The next prime is 420181973. The reversal of 420181944 is 449181024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94012 + ... + 98379.

It is an arithmetic number, because the mean of its divisors is an integer number (20201160).

Almost surely, 2^420181944 is an apocalyptic number.

It is an amenable number.

420181944 is an abundant number, since it is smaller than the sum of its proper divisors (872692296).

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

420181944 is a wasteful number, since it uses less digits than its factorization.

420181944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192420 (or 192416 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 420181944 is about 20498.3400303537. The cubic root of 420181944 is about 748.9953624276.

The spelling of 420181944 in words is "four hundred twenty million, one hundred eighty-one thousand, nine hundred forty-four".