1118207985 has 8 divisors (see below), whose sum is σ = 1789132800. Its totient is φ = 596377584.

The previous prime is 1118207977. The next prime is 1118207989. The reversal of 1118207985 is 5897028111.

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

It is not a de Polignac number, because 1118207985 - 2³ = 1118207977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1118207989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37273585 + ... + 37273614.

It is an arithmetic number, because the mean of its divisors is an integer number (223641600).

Almost surely, 2^1118207985 is an apocalyptic number.

1118207985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1118207985 is a deficient number, since it is larger than the sum of its proper divisors (670924815).

1118207985 is an equidigital number, since it uses as much as digits as its factorization.

1118207985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74547207.

The product of its (nonzero) digits is 40320, while the sum is 42.

The square root of 1118207985 is about 33439.6169984048. The cubic root of 1118207985 is about 1037.9446540335.

It can be divided in two parts, 111820 and 7985, that added together give a triangular number (119805 = T₄₈₉).

The spelling of 1118207985 in words is "one billion, one hundred eighteen million, two hundred seven thousand, nine hundred eighty-five".