612117838 has 8 divisors (see below), whose sum is σ = 931109040. Its totient is φ = 301748160.

The previous prime is 612117817. The next prime is 612117841. The reversal of 612117838 is 838711216.

612117838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 612117797 and 612117806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2155203 + ... + 2155486.

It is an arithmetic number, because the mean of its divisors is an integer number (116388630).

Almost surely, 2^612117838 is an apocalyptic number.

612117838 is a deficient number, since it is larger than the sum of its proper divisors (318991202).

612117838 is a wasteful number, since it uses less digits than its factorization.

612117838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310762.

The product of its digits is 16128, while the sum is 37.

The square root of 612117838 is about 24741.0152984877. The cubic root of 612117838 is about 849.0729630140.

It can be divided in two parts, 6121178 and 38, that added together give a palindrome (6121216).

The spelling of 612117838 in words is "six hundred twelve million, one hundred seventeen thousand, eight hundred thirty-eight".