420728344 has 16 divisors (see below), whose sum is σ = 789090120. Its totient is φ = 210304320.

The previous prime is 420728339. The next prime is 420728389. The reversal of 420728344 is 443827024.

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 3 ways as a sum of consecutive naturals, for example, 40467 + ... + 49789.

Almost surely, 2^420728344 is an apocalyptic number.

It is an amenable number.

420728344 is a deficient number, since it is larger than the sum of its proper divisors (368361776).

420728344 is a wasteful number, since it uses less digits than its factorization.

420728344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14970 (or 14966 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 420728344 is about 20511.6636087861. The cubic root of 420728344 is about 749.3198835901.

The spelling of 420728344 in words is "four hundred twenty million, seven hundred twenty-eight thousand, three hundred forty-four".