1164120638 has 4 divisors (see below), whose sum is σ = 1746180960. Its totient is φ = 582060318.

The previous prime is 1164120637. The next prime is 1164120701. The reversal of 1164120638 is 8360214611.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1164120637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291030158 + ... + 291030161.

It is an arithmetic number, because the mean of its divisors is an integer number (436545240).

Almost surely, 2^1164120638 is an apocalyptic number.

1164120638 is a deficient number, since it is larger than the sum of its proper divisors (582060322).

1164120638 is an equidigital number, since it uses as much as digits as its factorization.

1164120638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582060321.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1164120638 is about 34119.2121538584. The cubic root of 1164120638 is about 1051.9602498390.

The spelling of 1164120638 in words is "one billion, one hundred sixty-four million, one hundred twenty thousand, six hundred thirty-eight".