1161228638 has 8 divisors (see below), whose sum is σ = 1742024232. Its totient is φ = 580553896.

The previous prime is 1161228637. The next prime is 1161228667. The reversal of 1161228638 is 8368221611.

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

It is a super-2 number, since 2×1161228638² = 2696903899422670088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161228637) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 245 + ... + 48192.

It is an arithmetic number, because the mean of its divisors is an integer number (217753029).

Almost surely, 2^1161228638 is an apocalyptic number.

1161228638 is a deficient number, since it is larger than the sum of its proper divisors (580795594).

1161228638 is a wasteful number, since it uses less digits than its factorization.

1161228638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60426.

The product of its digits is 27648, while the sum is 38.

The square root of 1161228638 is about 34076.8049852095. The cubic root of 1161228638 is about 1051.0884066905.

The spelling of 1161228638 in words is "one billion, one hundred sixty-one million, two hundred twenty-eight thousand, six hundred thirty-eight".