423234440 has 32 divisors (see below), whose sum is σ = 961715160. Its totient is φ = 167616000.

The previous prime is 423234437. The next prime is 423234451. The reversal of 423234440 is 44432324.

It can be written as a sum of positive squares in 4 ways, for example, as 368563204 + 54671236 = 19198^2 + 7394^2 .

It is a super-2 number, since 2×423234440² = 358254782404227200, which contains 22 as substring.

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, 48341 + ... + 56420.

Almost surely, 2^423234440 is an apocalyptic number.

423234440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423234440 is an abundant number, since it is smaller than the sum of its proper divisors (538480720).

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

423234440 is a wasteful number, since it uses less digits than its factorization.

423234440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104873 (or 104869 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 423234440 is about 20572.6624431550. The cubic root of 423234440 is about 750.8047303108.

Adding to 423234440 its reverse (44432324), we get a palindrome (467666764).

The spelling of 423234440 in words is "four hundred twenty-three million, two hundred thirty-four thousand, four hundred forty".