5555988 has 18 divisors (see below), whose sum is σ = 14044394. Its totient is φ = 1851984.

The previous prime is 5555983. The next prime is 5555989. The reversal of 5555988 is 8895555.

5555988 is a `hidden beast` number, since 5 + 55 + 598 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5143824 + 412164 = 2268^2 + 642^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×5555988² = 61738005312288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77131 + ... + 77202.

Almost surely, 2^5555988 is an apocalyptic number.

It is an amenable number.

5555988 is an abundant number, since it is smaller than the sum of its proper divisors (8488406).

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

5555988 is a wasteful number, since it uses less digits than its factorization.

5555988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154343 (or 154338 counting only the distinct ones).

The product of its digits is 360000, while the sum is 45.

The square root of 5555988 is about 2357.1143374898. The cubic root of 5555988 is about 177.1143568192.

The spelling of 5555988 in words is "five million, five hundred fifty-five thousand, nine hundred eighty-eight".