550138988 has 24 divisors (see below), whose sum is σ = 1100961792. Its totient is φ = 235627344.

The previous prime is 550138987. The next prime is 550138999. The reversal of 550138988 is 889831055.

It is a super-2 number, since 2×550138988² = 605305812235328288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (550138987) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 48245 + ... + 58547.

It is an arithmetic number, because the mean of its divisors is an integer number (45873408).

Almost surely, 2^550138988 is an apocalyptic number.

It is an amenable number.

550138988 is an abundant number, since it is smaller than the sum of its proper divisors (550822804).

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

550138988 is a wasteful number, since it uses less digits than its factorization.

550138988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12221 (or 12219 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 47.

The square root of 550138988 is about 23455.0418460509. The cubic root of 550138988 is about 819.3902804393.

The spelling of 550138988 in words is "five hundred fifty million, one hundred thirty-eight thousand, nine hundred eighty-eight".