420320756 has 12 divisors (see below), whose sum is σ = 735726180. Its totient is φ = 210113280.

The previous prime is 420320749. The next prime is 420320759. The reversal of 420320756 is 657023024.

It can be written as a sum of positive squares in 2 ways, for example, as 9610000 + 410710756 = 3100^2 + 20266^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420320759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15140 + ... + 32708.

It is an arithmetic number, because the mean of its divisors is an integer number (61310515).

Almost surely, 2^420320756 is an apocalyptic number.

It is an amenable number.

420320756 is a deficient number, since it is larger than the sum of its proper divisors (315405424).

420320756 is a wasteful number, since it uses less digits than its factorization.

420320756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23554 (or 23552 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 420320756 is about 20501.7256834638. The cubic root of 420320756 is about 749.0778331276.

The spelling of 420320756 in words is "four hundred twenty million, three hundred twenty thousand, seven hundred fifty-six".