612290018 has 6 divisors (see below), whose sum is σ = 918487521. Its totient is φ = 306127512.

The previous prime is 612289967. The next prime is 612290033. The reversal of 612290018 is 810092216.

It can be written as a sum of positive squares in 2 ways, for example, as 338817649 + 273472369 = 18407^2 + 16537^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=17497.

It is a super-2 number, since 2×612290018² = 749798132284880648, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 26246 + ... + 43742.

Almost surely, 2^612290018 is an apocalyptic number.

612290018 is a deficient number, since it is larger than the sum of its proper divisors (306197503).

612290018 is an frugal number, since it uses more digits than its factorization.

612290018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34996 (or 17499 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 612290018 is about 24744.4947008420. The cubic root of 612290018 is about 849.1525662475.

The spelling of 612290018 in words is "six hundred twelve million, two hundred ninety thousand, eighteen".