609831216 has 30 divisors (see below), whose sum is σ = 1706680820. Its totient is φ = 203277024.

The previous prime is 609831181. The next prime is 609831217. The reversal of 609831216 is 612138906.

609831216 is a `hidden beast` number, since 609 + 8 + 31 + 2 + 16 = 666.

It is a super-2 number, since 2×609831216² = 743788224016077312, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (609831217) 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 5 ways as a sum of consecutive naturals, for example, 2117326 + ... + 2117613.

Almost surely, 2^609831216 is an apocalyptic number.

It is an amenable number.

609831216 is an abundant number, since it is smaller than the sum of its proper divisors (1096849604).

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

609831216 is a wasteful number, since it uses less digits than its factorization.

609831216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4234953 (or 4234944 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 609831216 is about 24694.7609018593. The cubic root of 609831216 is about 848.0143806153.

The spelling of 609831216 in words is "six hundred nine million, eight hundred thirty-one thousand, two hundred sixteen".