1138028712 has 128 divisors (see below), whose sum is σ = 3095347200. Its totient is φ = 347493888.

The previous prime is 1138028699. The next prime is 1138028713. The reversal of 1138028712 is 2178208311.

It is not an unprimeable number, because it can be changed into a prime (1138028713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2489988 + ... + 2490444.

It is an arithmetic number, because the mean of its divisors is an integer number (24182400).

Almost surely, 2^1138028712 is an apocalyptic number.

1138028712 is a gapful number since it is divisible by the number (12) 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 1138028712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1547673600).

1138028712 is an abundant number, since it is smaller than the sum of its proper divisors (1957318488).

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

1138028712 is a wasteful number, since it uses less digits than its factorization.

1138028712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 651 counting only the distinct ones).

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

The square root of 1138028712 is about 33734.6811456697. The cubic root of 1138028712 is about 1044.0414466598.

The spelling of 1138028712 in words is "one billion, one hundred thirty-eight million, twenty-eight thousand, seven hundred twelve".