1138121798 has 8 divisors (see below), whose sum is σ = 1862381160. Its totient is φ = 517328080.

The previous prime is 1138121783. The next prime is 1138121821. The reversal of 1138121798 is 8971218311.

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

It is a Curzon number.

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, 25866383 + ... + 25866426.

It is an arithmetic number, because the mean of its divisors is an integer number (232797645).

Almost surely, 2^1138121798 is an apocalyptic number.

1138121798 is a deficient number, since it is larger than the sum of its proper divisors (724259362).

1138121798 is a wasteful number, since it uses less digits than its factorization.

1138121798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51732822.

The product of its digits is 24192, while the sum is 41.

The square root of 1138121798 is about 33736.0607955345. The cubic root of 1138121798 is about 1044.0699119616.

The spelling of 1138121798 in words is "one billion, one hundred thirty-eight million, one hundred twenty-one thousand, seven hundred ninety-eight".