1272730720 has 48 divisors (see below), whose sum is σ = 3010089600. Its totient is φ = 508539904.

The previous prime is 1272730709. The next prime is 1272730741. The reversal of 1272730720 is 270372721.

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, 164049 + ... + 171631.

It is an arithmetic number, because the mean of its divisors is an integer number (62710200).

Almost surely, 2^1272730720 is an apocalyptic number.

1272730720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272730720 is an abundant number, since it is smaller than the sum of its proper divisors (1737358880).

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

1272730720 is a wasteful number, since it uses less digits than its factorization.

1272730720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8647 (or 8639 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 1272730720 is about 35675.3517151548. The cubic root of 1272730720 is about 1083.7077410933.

The spelling of 1272730720 in words is "one billion, two hundred seventy-two million, seven hundred thirty thousand, seven hundred twenty".