120131638 has 8 divisors (see below), whose sum is σ = 196579080. Its totient is φ = 54605280.

The previous prime is 120131633. The next prime is 120131653. The reversal of 120131638 is 836131021.

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

It is a super-2 number, since 2×120131638² = 28863220897126088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120131633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2730243 + ... + 2730286.

It is an arithmetic number, because the mean of its divisors is an integer number (24572385).

Almost surely, 2^120131638 is an apocalyptic number.

120131638 is a deficient number, since it is larger than the sum of its proper divisors (76447442).

120131638 is a wasteful number, since it uses less digits than its factorization.

120131638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5460542.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 120131638 is about 10960.4579283897. The cubic root of 120131638 is about 493.4227085252.

Adding to 120131638 its reverse (836131021), we get a palindrome (956262659).

The spelling of 120131638 in words is "one hundred twenty million, one hundred thirty-one thousand, six hundred thirty-eight".