550785378 has 64 divisors (see below), whose sum is σ = 1297400832. Its totient is φ = 153679680.

The previous prime is 550785377. The next prime is 550785379. The reversal of 550785378 is 873587055.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (550785377) and next prime (550785379).

It is not an unprimeable number, because it can be changed into a prime (550785377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 623325 + ... + 624207.

It is an arithmetic number, because the mean of its divisors is an integer number (20271888).

Almost surely, 2^550785378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550785378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (648700416).

550785378 is an abundant number, since it is smaller than the sum of its proper divisors (746615454).

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

550785378 is a wasteful number, since it uses less digits than its factorization.

550785378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639.

The product of its (nonzero) digits is 1176000, while the sum is 48.

The square root of 550785378 is about 23468.8171410491. The cubic root of 550785378 is about 819.7110711202.

The spelling of 550785378 in words is "five hundred fifty million, seven hundred eighty-five thousand, three hundred seventy-eight".