1200008985 has 32 divisors (see below), whose sum is σ = 2225221632. Its totient is φ = 540845760.

The previous prime is 1200008981. The next prime is 1200008993. The reversal of 1200008985 is 5898000021.

It is a happy number.

It is not a de Polignac number, because 1200008985 - 2² = 1200008981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200008981) 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, 73029 + ... + 87938.

It is an arithmetic number, because the mean of its divisors is an integer number (69538176).

Almost surely, 2^1200008985 is an apocalyptic number.

1200008985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1200008985 is a deficient number, since it is larger than the sum of its proper divisors (1025212647).

1200008985 is a wasteful number, since it uses less digits than its factorization.

1200008985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161053.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1200008985 is about 34641.1458384390. The cubic root of 1200008985 is about 1062.6612213947.

The spelling of 1200008985 in words is "one billion, two hundred million, eight thousand, nine hundred eighty-five".