1138810529 has 4 divisors (see below), whose sum is σ = 1138878720. Its totient is φ = 1138742340.

The previous prime is 1138810511. The next prime is 1138810549. The reversal of 1138810529 is 9250188311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138810529 is a prime.

It is a super-2 number, since 2×1138810529² = 2593778841922519682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1138810492 and 1138810501.

It is not an unprimeable number, because it can be changed into a prime (1138810549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9752 + ... + 48710.

It is an arithmetic number, because the mean of its divisors is an integer number (284719680).

Almost surely, 2^1138810529 is an apocalyptic number.

It is an amenable number.

1138810529 is a deficient number, since it is larger than the sum of its proper divisors (68191).

1138810529 is an equidigital number, since it uses as much as digits as its factorization.

1138810529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68190.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 1138810529 is about 33746.2668898354. The cubic root of 1138810529 is about 1044.2804747544.

The spelling of 1138810529 in words is "one billion, one hundred thirty-eight million, eight hundred ten thousand, five hundred twenty-nine".