118738581 has 32 divisors (see below), whose sum is σ = 187299840. Its totient is φ = 66204864.

The previous prime is 118738579. The next prime is 118738639. The reversal of 118738581 is 185837811.

It is not a de Polignac number, because 118738581 - 2¹ = 118738579 is a prime.

It is a super-2 number, since 2×118738581² = 28197701235787122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118738511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13560 + ... + 20526.

It is an arithmetic number, because the mean of its divisors is an integer number (5853120).

Almost surely, 2^118738581 is an apocalyptic number.

It is an amenable number.

118738581 is a deficient number, since it is larger than the sum of its proper divisors (68561259).

118738581 is a wasteful number, since it uses less digits than its factorization.

118738581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025.

The product of its digits is 53760, while the sum is 42.

The square root of 118738581 is about 10896.7234066026. The cubic root of 118738581 is about 491.5080307650.

The spelling of 118738581 in words is "one hundred eighteen million, seven hundred thirty-eight thousand, five hundred eighty-one".