5621988 has 12 divisors (see below), whose sum is σ = 13118000. Its totient is φ = 1873992.

The previous prime is 5621983. The next prime is 5621989. The reversal of 5621988 is 8891265.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (5621983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234238 + ... + 234261.

Almost surely, 2^5621988 is an apocalyptic number.

It is an amenable number.

5621988 is an abundant number, since it is smaller than the sum of its proper divisors (7496012).

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

5621988 is a wasteful number, since it uses less digits than its factorization.

5621988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468506 (or 468504 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 5621988 is about 2371.0731747460. The cubic root of 5621988 is about 177.8129162603.

The spelling of 5621988 in words is "five million, six hundred twenty-one thousand, nine hundred eighty-eight".