420330720 has 48 divisors (see below), whose sum is σ = 1324043280. Its totient is φ = 112088064.

The previous prime is 420330709. The next prime is 420330761. The reversal of 420330720 is 27033024.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437365 + ... + 438324.

It is an arithmetic number, because the mean of its divisors is an integer number (27584235).

Almost surely, 2^420330720 is an apocalyptic number.

420330720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420330720 is an abundant number, since it is smaller than the sum of its proper divisors (903712560).

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

420330720 is a wasteful number, since it uses less digits than its factorization.

420330720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875707 (or 875699 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 420330720 is about 20501.9686859579. The cubic root of 420330720 is about 749.0837522203.

Adding to 420330720 its reverse (27033024), we get a palindrome (447363744).

The spelling of 420330720 in words is "four hundred twenty million, three hundred thirty thousand, seven hundred twenty".