423122540 has 12 divisors (see below), whose sum is σ = 888557376. Its totient is φ = 169249008.

The previous prime is 423122521. The next prime is 423122561. The reversal of 423122540 is 45221324.

It is a happy number.

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, 10578044 + ... + 10578083.

It is an arithmetic number, because the mean of its divisors is an integer number (74046448).

Almost surely, 2^423122540 is an apocalyptic number.

It is an amenable number.

423122540 is an abundant number, since it is smaller than the sum of its proper divisors (465434836).

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

423122540 is a wasteful number, since it uses less digits than its factorization.

423122540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21156136 (or 21156134 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 423122540 is about 20569.9426348252. The cubic root of 423122540 is about 750.7385554387.

Adding to 423122540 its reverse (45221324), we get a palindrome (468343864).

The spelling of 423122540 in words is "four hundred twenty-three million, one hundred twenty-two thousand, five hundred forty".