550138992 has 160 divisors (see below), whose sum is σ = 1582190400. Its totient is φ = 163676160.

The previous prime is 550138987. The next prime is 550138999. The reversal of 550138992 is 299831055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550138999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3692134 + ... + 3692282.

It is an arithmetic number, because the mean of its divisors is an integer number (9888690).

Almost surely, 2^550138992 is an apocalyptic number.

550138992 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550138992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791095200).

550138992 is an abundant number, since it is smaller than the sum of its proper divisors (1032051408).

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

550138992 is a wasteful number, since it uses less digits than its factorization.

550138992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 550138992 is about 23455.0419313204. The cubic root of 550138992 is about 819.3902824252.

The spelling of 550138992 in words is "five hundred fifty million, one hundred thirty-eight thousand, nine hundred ninety-two".