404066556 has 30 divisors (see below), whose sum is σ = 1056310640. Its totient is φ = 134688744.

The previous prime is 404066549. The next prime is 404066573. The reversal of 404066556 is 655660404.

It is a happy number.

404066556 is a `hidden beast` number, since 4 + 0 + 40 + 66 + 556 = 666.

It is a super-2 number, since 2×404066556² = 326539563355402272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 404066556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 623236 + ... + 623883.

Almost surely, 2^404066556 is an apocalyptic number.

It is an amenable number.

404066556 is an abundant number, since it is smaller than the sum of its proper divisors (652244084).

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

404066556 is a wasteful number, since it uses less digits than its factorization.

404066556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247135 (or 1247124 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 404066556 is about 20101.4068164395. The cubic root of 404066556 is about 739.2947724878.

The spelling of 404066556 in words is "four hundred four million, sixty-six thousand, five hundred fifty-six".