1272738888 has 96 divisors (see below), whose sum is σ = 3495623040. Its totient is φ = 418306560.

The previous prime is 1272738773. The next prime is 1272738889. The reversal of 1272738888 is 8888372721.

It is not an unprimeable number, because it can be changed into a prime (1272738889) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2530045 + ... + 2530547.

It is an arithmetic number, because the mean of its divisors is an integer number (36412740).

Almost surely, 2^1272738888 is an apocalyptic number.

1272738888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272738888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1747811520).

1272738888 is an abundant number, since it is smaller than the sum of its proper divisors (2222884152).

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

1272738888 is a wasteful number, since it uses less digits than its factorization.

1272738888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 932 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The square root of 1272738888 is about 35675.4661917683. The cubic root of 1272738888 is about 1083.7100593910.

It can be divided in two parts, 127273 and 8888, that added together give a square (136161 = 369²).

The spelling of 1272738888 in words is "one billion, two hundred seventy-two million, seven hundred thirty-eight thousand, eight hundred eighty-eight".