427636881 has 16 divisors (see below), whose sum is σ = 724041600. Its totient is φ = 244363824.

The previous prime is 427636877. The next prime is 427636889. The reversal of 427636881 is 188636724.

427636881 is a `hidden beast` number, since 4 + 2 + 7 + 636 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 427636881 - 2² = 427636877 is a prime.

It is a super-2 number, since 2×427636881² = 365746603982816322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (427636889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1131126 + ... + 1131503.

It is an arithmetic number, because the mean of its divisors is an integer number (45252600).

Almost surely, 2^427636881 is an apocalyptic number.

It is an amenable number.

427636881 is a deficient number, since it is larger than the sum of its proper divisors (296404719).

427636881 is a wasteful number, since it uses less digits than its factorization.

427636881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262645 (or 2262639 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 427636881 is about 20679.3829936969. The cubic root of 427636881 is about 753.3990202771.

The spelling of 427636881 in words is "four hundred twenty-seven million, six hundred thirty-six thousand, eight hundred eighty-one".