423866556 has 54 divisors (see below), whose sum is σ = 1082451552. Its totient is φ = 139851360.

The previous prime is 423866549. The next prime is 423866567. The reversal of 423866556 is 655668324.

423866556 is a `hidden beast` number, since 4 + 2 + 38 + 66 + 556 = 666.

It is a super-2 number, since 2×423866556² = 359325714590602272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 427221 + ... + 428211.

Almost surely, 2^423866556 is an apocalyptic number.

It is an amenable number.

423866556 is an abundant number, since it is smaller than the sum of its proper divisors (658584996).

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

423866556 is a wasteful number, since it uses less digits than its factorization.

423866556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219 (or 1105 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 423866556 is about 20588.0197202159. The cubic root of 423866556 is about 751.1783290846.

The spelling of 423866556 in words is "four hundred twenty-three million, eight hundred sixty-six thousand, five hundred fifty-six".