420240372 has 12 divisors (see below), whose sum is σ = 980560896. Its totient is φ = 140080120.

The previous prime is 420240361. The next prime is 420240377. The reversal of 420240372 is 273042024.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420240377) 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, 17510004 + ... + 17510027.

It is an arithmetic number, because the mean of its divisors is an integer number (81713408).

Almost surely, 2^420240372 is an apocalyptic number.

It is an amenable number.

420240372 is an abundant number, since it is smaller than the sum of its proper divisors (560320524).

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

420240372 is a wasteful number, since it uses less digits than its factorization.

420240372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35020038 (or 35020036 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 420240372 is about 20499.7651693867. The cubic root of 420240372 is about 749.0300777641.

Adding to 420240372 its reverse (273042024), we get a palindrome (693282396).

The spelling of 420240372 in words is "four hundred twenty million, two hundred forty thousand, three hundred seventy-two".