1138157198 has 4 divisors (see below), whose sum is σ = 1707235800. Its totient is φ = 569078598.

The previous prime is 1138157173. The next prime is 1138157201. The reversal of 1138157198 is 8917518311.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1138157198² = 2590803614718422408, which contains 22 as substring.

It is a congruent 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 as a sum of consecutive naturals, namely, 284539298 + ... + 284539301.

It is an arithmetic number, because the mean of its divisors is an integer number (426808950).

Almost surely, 2^1138157198 is an apocalyptic number.

1138157198 is a deficient number, since it is larger than the sum of its proper divisors (569078602).

1138157198 is an equidigital number, since it uses as much as digits as its factorization.

1138157198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569078601.

The product of its digits is 60480, while the sum is 44.

The square root of 1138157198 is about 33736.5854525914. The cubic root of 1138157198 is about 1044.0807367233.

The spelling of 1138157198 in words is "one billion, one hundred thirty-eight million, one hundred fifty-seven thousand, one hundred ninety-eight".