550000440 has 96 divisors (see below), whose sum is σ = 1950015600. Its totient is φ = 133332480.

The previous prime is 550000427. The next prime is 550000441. The reversal of 550000440 is 44000055.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550000441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65485 + ... + 73404.

Almost surely, 2^550000440 is an apocalyptic number.

It is an amenable number.

550000440 is an abundant number, since it is smaller than the sum of its proper divisors (1400015160).

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

550000440 is a wasteful number, since it uses less digits than its factorization.

550000440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138917 (or 138910 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 550000440 is about 23452.0881799468. The cubic root of 550000440 is about 819.3214890863.

Adding to 550000440 its reverse (44000055), we get a palindrome (594000495).

The spelling of 550000440 in words is "five hundred fifty million, four hundred forty", and thus it is an aban number.