420740324 has 12 divisors (see below), whose sum is σ = 736595244. Its totient is φ = 210284544.

The previous prime is 420740317. The next prime is 420740377. The reversal of 420740324 is 423047024.

It can be written as a sum of positive squares in 2 ways, for example, as 279558400 + 141181924 = 16720^2 + 11882^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420740293 and 420740302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9629 + ... + 30564.

It is an arithmetic number, because the mean of its divisors is an integer number (61382937).

Almost surely, 2^420740324 is an apocalyptic number.

It is an amenable number.

420740324 is a deficient number, since it is larger than the sum of its proper divisors (315854920).

420740324 is a wasteful number, since it uses less digits than its factorization.

420740324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42814 (or 42812 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 420740324 is about 20511.9556356775. The cubic root of 420740324 is about 749.3269956750.

Adding to 420740324 its reverse (423047024), we get a palindrome (843787348).

The spelling of 420740324 in words is "four hundred twenty million, seven hundred forty thousand, three hundred twenty-four".