427881556 has 6 divisors (see below), whose sum is σ = 748792730. Its totient is φ = 213940776.

The previous prime is 427881533. The next prime is 427881563. The reversal of 427881556 is 655188724.

It can be written as a sum of positive squares in only one way, i.e., 229522500 + 198359056 = 15150^2 + 14084^2 .

It is a super-2 number, since 2×427881556² = 366165251929962272, 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 as a sum of consecutive naturals, namely, 53485191 + ... + 53485198.

Almost surely, 2^427881556 is an apocalyptic number.

It is an amenable number.

427881556 is a deficient number, since it is larger than the sum of its proper divisors (320911174).

427881556 is a wasteful number, since it uses less digits than its factorization.

427881556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106970393 (or 106970391 counting only the distinct ones).

The product of its digits is 537600, while the sum is 46.

The square root of 427881556 is about 20685.2980640841. The cubic root of 427881556 is about 753.5426801343.

It can be divided in two parts, 42788 and 1556, that added together give a palindrome (44344).

The spelling of 427881556 in words is "four hundred twenty-seven million, eight hundred eighty-one thousand, five hundred fifty-six".