609138822 has 64 divisors (see below), whose sum is σ = 1308672000. Its totient is φ = 188461728.

The previous prime is 609138821. The next prime is 609138889. The reversal of 609138822 is 228831906.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609138821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2152293 + ... + 2152575.

It is an arithmetic number, because the mean of its divisors is an integer number (20448000).

Almost surely, 2^609138822 is an apocalyptic number.

609138822 is an abundant number, since it is smaller than the sum of its proper divisors (699533178).

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

609138822 is a wasteful number, since it uses less digits than its factorization.

609138822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 609138822 is about 24680.7378738967. The cubic root of 609138822 is about 847.6933177749.

It can be divided in two parts, 609138 and 822, that added together give a triangular number (609960 = T₁₁₀₄).

The spelling of 609138822 in words is "six hundred nine million, one hundred thirty-eight thousand, eight hundred twenty-two".