420443740 has 24 divisors (see below), whose sum is σ = 913379040. Its totient is φ = 162378048.

The previous prime is 420443713. The next prime is 420443741. The reversal of 420443740 is 47344024.

It is a junction number, because it is equal to n+sod(n) for n = 420443699 and 420443708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420443741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361872 + ... + 363031.

It is an arithmetic number, because the mean of its divisors is an integer number (38057460).

Almost surely, 2^420443740 is an apocalyptic number.

It is an amenable number.

420443740 is an abundant number, since it is smaller than the sum of its proper divisors (492935300).

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

420443740 is a wasteful number, since it uses less digits than its factorization.

420443740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724941 (or 724939 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 28.

The square root of 420443740 is about 20504.7248213674. The cubic root of 420443740 is about 749.1508849602.

Adding to 420443740 its reverse (47344024), we get a palindrome (467787764).

The spelling of 420443740 in words is "four hundred twenty million, four hundred forty-three thousand, seven hundred forty".