1138881480 has 64 divisors (see below), whose sum is σ = 3727252800. Its totient is φ = 276092160.

The previous prime is 1138881463. The next prime is 1138881481. The reversal of 1138881480 is 841888311.

It is not an unprimeable number, because it can be changed into a prime (1138881481) 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, 430075 + ... + 432714.

It is an arithmetic number, because the mean of its divisors is an integer number (58238325).

Almost surely, 2^1138881480 is an apocalyptic number.

1138881480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138881480 is an abundant number, since it is smaller than the sum of its proper divisors (2588371320).

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

1138881480 is a wasteful number, since it uses less digits than its factorization.

1138881480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862814 (or 862810 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 42.

The square root of 1138881480 is about 33747.3181156666. The cubic root of 1138881480 is about 1044.3021614774.

The spelling of 1138881480 in words is "one billion, one hundred thirty-eight million, eight hundred eighty-one thousand, four hundred eighty".