1138810530 has 128 divisors (see below), whose sum is σ = 3231083520. Its totient is φ = 253244160.

The previous prime is 1138810511. The next prime is 1138810549. The reversal of 1138810530 is 350188311.

It is an interprime number because it is at equal distance from previous prime (1138810511) and next prime (1138810549).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 767169 + ... + 768651.

It is an arithmetic number, because the mean of its divisors is an integer number (25242840).

Almost surely, 2^1138810530 is an apocalyptic number.

1138810530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138810530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1615541760).

1138810530 is an abundant number, since it is smaller than the sum of its proper divisors (2092272990).

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

1138810530 is a wasteful number, since it uses less digits than its factorization.

1138810530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 1138810530 is about 33746.2669046518. The cubic root of 1138810530 is about 1044.2804750601.

Adding to 1138810530 its reverse (350188311), we get a palindrome (1488998841).

The spelling of 1138810530 in words is "one billion, one hundred thirty-eight million, eight hundred ten thousand, five hundred thirty".