550851840 has 864 divisors, whose sum is σ = 2571319296. Its totient is φ = 109486080.

The previous prime is 550851809. The next prime is 550851841. The reversal of 550851840 is 48158055.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 550851795 and 550851804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550851841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23950069 + ... + 23950091.

It is an arithmetic number, because the mean of its divisors is an integer number (2976064).

Almost surely, 2^550851840 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 550851840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1285659648).

550851840 is an abundant number, since it is smaller than the sum of its proper divisors (2020467456).

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

550851840 is a wasteful number, since it uses less digits than its factorization.

550851840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 550851840 is about 23470.2330623281. The cubic root of 550851840 is about 819.7440406749.

The spelling of 550851840 in words is "five hundred fifty million, eight hundred fifty-one thousand, eight hundred forty".