609191226 has 192 divisors, whose sum is σ = 1728604800. Its totient is φ = 157828608.

The previous prime is 609191213. The next prime is 609191239. The reversal of 609191226 is 622191906.

609191226 is a `hidden beast` number, since 609 + 19 + 12 + 26 = 666.

It is an interprime number because it is at equal distance from previous prime (609191213) and next prime (609191239).

It is a super-2 number, since 2×609191226² = 742227899670766152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1304245 + ... + 1304711.

It is an arithmetic number, because the mean of its divisors is an integer number (9003150).

Almost surely, 2^609191226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609191226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864302400).

609191226 is an abundant number, since it is smaller than the sum of its proper divisors (1119413574).

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

609191226 is a wasteful number, since it uses less digits than its factorization.

609191226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 609191226 is about 24681.7994886921. The cubic root of 609191226 is about 847.7176259978.

The spelling of 609191226 in words is "six hundred nine million, one hundred ninety-one thousand, two hundred twenty-six".