1320440272 has 40 divisors (see below), whose sum is σ = 2576475720. Its totient is φ = 655564800.

The previous prime is 1320440243. The next prime is 1320440323. The reversal of 1320440272 is 2720440231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 194435136 + 1126005136 = 13944^2 + 33556^2 .

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, 2196772 + ... + 2197372.

It is an arithmetic number, because the mean of its divisors is an integer number (64411893).

Almost surely, 2^1320440272 is an apocalyptic number.

It is an amenable number.

1320440272 is a deficient number, since it is larger than the sum of its proper divisors (1256035448).

1320440272 is a wasteful number, since it uses less digits than its factorization.

1320440272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 1320440272 is about 36337.8627880067. The cubic root of 1320440272 is about 1097.0832568664.

The spelling of 1320440272 in words is "one billion, three hundred twenty million, four hundred forty thousand, two hundred seventy-two".