1138718340 has 36 divisors (see below), whose sum is σ = 3454112844. Its totient is φ = 303658176.

The previous prime is 1138718333. The next prime is 1138718341. The reversal of 1138718340 is 438178311.

It can be written as a sum of positive squares in 2 ways, for example, as 792535104 + 346183236 = 28152^2 + 18606^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1138718295 and 1138718304.

It is not an unprimeable number, because it can be changed into a prime (1138718341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3162927 + ... + 3163286.

It is an arithmetic number, because the mean of its divisors is an integer number (95947579).

Almost surely, 2^1138718340 is an apocalyptic number.

1138718340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138718340 is an abundant number, since it is smaller than the sum of its proper divisors (2315394504).

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

1138718340 is a wasteful number, since it uses less digits than its factorization.

1138718340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6326228 (or 6326223 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1138718340 is about 33744.9009481433. The cubic root of 1138718340 is about 1044.2522951266.

The spelling of 1138718340 in words is "one billion, one hundred thirty-eight million, seven hundred eighteen thousand, three hundred forty".