550385604 has 90 divisors (see below), whose sum is σ = 1471992830. Its totient is φ = 179324928.

The previous prime is 550385593. The next prime is 550385611. The reversal of 550385604 is 406583055.

It can be written as a sum of positive squares in only one way, i.e., 447322500 + 103063104 = 21150^2 + 10152^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 715332 + ... + 716100.

Almost surely, 2^550385604 is an apocalyptic number.

550385604 is a gapful number since it is divisible by the number (54) 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 550385604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (735996415).

550385604 is an abundant number, since it is smaller than the sum of its proper divisors (921607226).

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

550385604 is a wasteful number, since it uses less digits than its factorization.

550385604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 550385604 is about 23460.2984635746. The cubic root of 550385604 is about 819.5127007549.

The spelling of 550385604 in words is "five hundred fifty million, three hundred eighty-five thousand, six hundred four".