1275727488 has 128 divisors (see below), whose sum is σ = 4076736000. Its totient is φ = 345295872.

The previous prime is 1275727459. The next prime is 1275727489. The reversal of 1275727488 is 8847275721.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 1275727488.

It is not an unprimeable number, because it can be changed into a prime (1275727489) 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, 38583 + ... + 63561.

It is an arithmetic number, because the mean of its divisors is an integer number (31849500).

Almost surely, 2^1275727488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1275727488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2038368000).

1275727488 is an abundant number, since it is smaller than the sum of its proper divisors (2801008512).

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

1275727488 is a wasteful number, since it uses less digits than its factorization.

1275727488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25022 (or 25010 counting only the distinct ones).

The product of its digits is 1756160, while the sum is 51.

The square root of 1275727488 is about 35717.3275596033. The cubic root of 1275727488 is about 1084.5576394030.

The spelling of 1275727488 in words is "one billion, two hundred seventy-five million, seven hundred twenty-seven thousand, four hundred eighty-eight".