423861556 has 6 divisors (see below), whose sum is σ = 741757730. Its totient is φ = 211930776.

The previous prime is 423861553. The next prime is 423861569. The reversal of 423861556 is 655168324.

It can be written as a sum of positive squares in only one way, i.e., 399200400 + 24661156 = 19980^2 + 4966^2 .

It is a super-2 number, since 2×423861556² = 359317237309482272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423861553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52982691 + ... + 52982698.

Almost surely, 2^423861556 is an apocalyptic number.

It is an amenable number.

423861556 is a deficient number, since it is larger than the sum of its proper divisors (317896174).

423861556 is a wasteful number, since it uses less digits than its factorization.

423861556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105965393 (or 105965391 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 423861556 is about 20587.8982900149. The cubic root of 423861556 is about 751.1753753984.

The spelling of 423861556 in words is "four hundred twenty-three million, eight hundred sixty-one thousand, five hundred fifty-six".