550879920 has 320 divisors, whose sum is σ = 2066534400. Its totient is φ = 134369280.

The previous prime is 550879919. The next prime is 550879981. The reversal of 550879920 is 29978055.

It is a happy number.

550879920 is a `hidden beast` number, since 550 + 8 + 7 + 9 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1272024 + ... + 1272456.

It is an arithmetic number, because the mean of its divisors is an integer number (6457920).

Almost surely, 2^550879920 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 550879920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1033267200).

550879920 is an abundant number, since it is smaller than the sum of its proper divisors (1515654480).

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

550879920 is a wasteful number, since it uses less digits than its factorization.

550879920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 550879920 is about 23470.8312592460. The cubic root of 550879920 is about 819.7579694182.

The spelling of 550879920 in words is "five hundred fifty million, eight hundred seventy-nine thousand, nine hundred twenty".