1200664440 has 96 divisors (see below), whose sum is σ = 4131719280. Its totient is φ = 301341696.

The previous prime is 1200664433. The next prime is 1200664481. The reversal of 1200664440 is 444660021.

1200664440 is a `hidden beast` number, since 12 + 0 + 0 + 6 + 644 + 4 + 0 = 666.

1200664440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91974 + ... + 104213.

Almost surely, 2^1200664440 is an apocalyptic number.

1200664440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200664440 is an abundant number, since it is smaller than the sum of its proper divisors (2931054840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200664440 is a wasteful number, since it uses less digits than its factorization.

1200664440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196221 (or 196214 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1200664440 is about 34650.6051895201. The cubic root of 1200664440 is about 1062.8546643444.

The spelling of 1200664440 in words is "one billion, two hundred million, six hundred sixty-four thousand, four hundred forty".