1138790088 has 108 divisors (see below), whose sum is σ = 3194209395. Its totient is φ = 366520320.

The previous prime is 1138790071. The next prime is 1138790111. The reversal of 1138790088 is 8800978311.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 32695524 + 1106094564 = 5718^2 + 33258^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=23862.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11740056 + ... + 11740152.

Almost surely, 2^1138790088 is an apocalyptic number.

1138790088 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 1138790088

1138790088 is an abundant number, since it is smaller than the sum of its proper divisors (2055419307).

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

1138790088 is an equidigital number, since it uses as much as digits as its factorization.

1138790088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 1138790088 is about 33745.9640253468. The cubic root of 1138790088 is about 1044.2742266372.

It can be divided in two parts, 11387 and 90088, that added together give a triangular number (101475 = T₄₅₀).

The spelling of 1138790088 in words is "one billion, one hundred thirty-eight million, seven hundred ninety thousand, eighty-eight".