1273270728 has 32 divisors (see below), whose sum is σ = 3243240000. Its totient is φ = 416415168.

The previous prime is 1273270699. The next prime is 1273270763. The reversal of 1273270728 is 8270723721.

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, 499228 + ... + 501771.

It is an arithmetic number, because the mean of its divisors is an integer number (101351250).

Almost surely, 2^1273270728 is an apocalyptic number.

It is an amenable number.

1273270728 is an abundant number, since it is smaller than the sum of its proper divisors (1969969272).

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

1273270728 is a wasteful number, since it uses less digits than its factorization.

1273270728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001061 (or 1001057 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 1273270728 is about 35682.9192751938. The cubic root of 1273270728 is about 1083.8609885147.

The spelling of 1273270728 in words is "one billion, two hundred seventy-three million, two hundred seventy thousand, seven hundred twenty-eight".