118928781 has 12 divisors (see below), whose sum is σ = 171910752. Its totient is φ = 79228296.

The previous prime is 118928759. The next prime is 118928783. The reversal of 118928781 is 187829811.

It is a happy number.

It is not a de Polignac number, because 118928781 - 2⁶ = 118928717 is a prime.

It is a super-2 number, since 2×118928781² = 28288109900291922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118928783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11040 + ... + 18966.

It is an arithmetic number, because the mean of its divisors is an integer number (14325896).

Almost surely, 2^118928781 is an apocalyptic number.

It is an amenable number.

118928781 is a deficient number, since it is larger than the sum of its proper divisors (52981971).

118928781 is a wasteful number, since it uses less digits than its factorization.

118928781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9600 (or 9597 counting only the distinct ones).

The product of its digits is 64512, while the sum is 45.

The square root of 118928781 is about 10905.4473085702. The cubic root of 118928781 is about 491.7703295483.

The spelling of 118928781 in words is "one hundred eighteen million, nine hundred twenty-eight thousand, seven hundred eighty-one".