1138127280 has 40 divisors (see below), whose sum is σ = 3528195312. Its totient is φ = 303500544.

The previous prime is 1138127269. The next prime is 1138127293. The reversal of 1138127280 is 827218311.

It is a tau number, because it is divible by the number of its divisors (40).

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, 2370859 + ... + 2371338.

Almost surely, 2^1138127280 is an apocalyptic number.

1138127280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138127280 is an abundant number, since it is smaller than the sum of its proper divisors (2390068032).

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

1138127280 is a wasteful number, since it uses less digits than its factorization.

1138127280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742213 (or 4742207 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 1138127280 is about 33736.1420438082. The cubic root of 1138127280 is about 1044.0715882855.

The spelling of 1138127280 in words is "one billion, one hundred thirty-eight million, one hundred twenty-seven thousand, two hundred eighty".