1200443440 has 80 divisors (see below), whose sum is σ = 3377408832. Its totient is φ = 387366912.

The previous prime is 1200443401. The next prime is 1200443443. The reversal of 1200443440 is 443440021.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1200443443) 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, 53529 + ... + 72568.

Almost surely, 2^1200443440 is an apocalyptic number.

1200443440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200443440 is an abundant number, since it is smaller than the sum of its proper divisors (2176965392).

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

1200443440 is a wasteful number, since it uses less digits than its factorization.

1200443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126134 (or 126128 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1200443440 is about 34647.4160652710. The cubic root of 1200443440 is about 1062.7894489835.

Adding to 1200443440 its reverse (443440021), we get a palindrome (1643883461).

The spelling of 1200443440 in words is "one billion, two hundred million, four hundred forty-three thousand, four hundred forty".