1138927198 has 8 divisors (see below), whose sum is σ = 1709151192. Its totient is φ = 569210136.

The previous prime is 1138927187. The next prime is 1138927211. The reversal of 1138927198 is 8917298311.

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

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, 121065 + ... + 130132.

It is an arithmetic number, because the mean of its divisors is an integer number (213643899).

Almost surely, 2^1138927198 is an apocalyptic number.

1138927198 is a deficient number, since it is larger than the sum of its proper divisors (570223994).

1138927198 is a wasteful number, since it uses less digits than its factorization.

1138927198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253466.

The product of its digits is 217728, while the sum is 49.

The square root of 1138927198 is about 33747.9954663977. The cubic root of 1138927198 is about 1044.3161350611.

The spelling of 1138927198 in words is "one billion, one hundred thirty-eight million, nine hundred twenty-seven thousand, one hundred ninety-eight".