1200666320 has 40 divisors (see below), whose sum is σ = 3190343424. Its totient is φ = 411656832.

The previous prime is 1200666251. The next prime is 1200666349. The reversal of 1200666320 is 236660021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1200666320² = 2883199223964684800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1200666320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071464 + ... + 1072583.

Almost surely, 2^1200666320 is an apocalyptic number.

1200666320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200666320 is an abundant number, since it is smaller than the sum of its proper divisors (1989677104).

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

1200666320 is a wasteful number, since it uses less digits than its factorization.

1200666320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144067 (or 2144061 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1200666320 is about 34650.6323174628. The cubic root of 1200666320 is about 1062.8552190832.

The spelling of 1200666320 in words is "one billion, two hundred million, six hundred sixty-six thousand, three hundred twenty".