550861320 has 128 divisors (see below), whose sum is σ = 1714775040. Its totient is φ = 141419520.

The previous prime is 550861279. The next prime is 550861331. The reversal of 550861320 is 23168055.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1387362 + ... + 1387758.

It is an arithmetic number, because the mean of its divisors is an integer number (13396680).

Almost surely, 2^550861320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550861320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857387520).

550861320 is an abundant number, since it is smaller than the sum of its proper divisors (1163913720).

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

550861320 is a wasteful number, since it uses less digits than its factorization.

550861320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 550861320 is about 23470.4350194026. The cubic root of 550861320 is about 819.7487431668.

The spelling of 550861320 in words is "five hundred fifty million, eight hundred sixty-one thousand, three hundred twenty".