118409785 has 16 divisors (see below), whose sum is σ = 154150416. Its totient is φ = 86796288.

The previous prime is 118409761. The next prime is 118409789. The reversal of 118409785 is 587904811.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 36036009 + 82373776 = 6003^2 + 9076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118409785 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118409789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2257 + ... + 15553.

It is an arithmetic number, because the mean of its divisors is an integer number (9634401).

Almost surely, 2^118409785 is an apocalyptic number.

It is an amenable number.

118409785 is a deficient number, since it is larger than the sum of its proper divisors (35740631).

118409785 is a wasteful number, since it uses less digits than its factorization.

118409785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13452.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 118409785 is about 10881.6260273913. The cubic root of 118409785 is about 491.0539372169.

The spelling of 118409785 in words is "one hundred eighteen million, four hundred nine thousand, seven hundred eighty-five".