1939120918 has 8 divisors (see below), whose sum is σ = 3324207312. Its totient is φ = 831051816.

The previous prime is 1939120903. The next prime is 1939120919. The reversal of 1939120918 is 8190219391.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939120919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69254305 + ... + 69254332.

It is an arithmetic number, because the mean of its divisors is an integer number (415525914).

Almost surely, 2^1939120918 is an apocalyptic number.

1939120918 is a deficient number, since it is larger than the sum of its proper divisors (1385086394).

1939120918 is a wasteful number, since it uses less digits than its factorization.

1939120918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138508646.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 1939120918 is about 44035.4506960017. The cubic root of 1939120918 is about 1247.0052936232.

The spelling of 1939120918 in words is "one billion, nine hundred thirty-nine million, one hundred twenty thousand, nine hundred eighteen".