550117890 has 96 divisors (see below), whose sum is σ = 1638164736. Its totient is φ = 125470080.

The previous prime is 550117879. The next prime is 550117901. The reversal of 550117890 is 98711055.

550117890 is a `hidden beast` number, since 550 + 1 + 17 + 8 + 90 = 666.

It is an interprime number because it is at equal distance from previous prime (550117879) and next prime (550117901).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 517960 + ... + 519020.

It is an arithmetic number, because the mean of its divisors is an integer number (17064216).

Almost surely, 2^550117890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550117890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (819082368).

550117890 is an abundant number, since it is smaller than the sum of its proper divisors (1088046846).

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

550117890 is a wasteful number, since it uses less digits than its factorization.

550117890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904 (or 1901 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 550117890 is about 23454.5920876915. The cubic root of 550117890 is about 819.3798056820.

The spelling of 550117890 in words is "five hundred fifty million, one hundred seventeen thousand, eight hundred ninety".