1138587275 has 18 divisors (see below), whose sum is σ = 1642355820. Its totient is φ = 780744720.

The previous prime is 1138587271. The next prime is 1138587283. The reversal of 1138587275 is 5727858311.

It is a happy number.

It is not a de Polignac number, because 1138587275 - 2² = 1138587271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1138587271) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 463505 + ... + 465954.

It is an arithmetic number, because the mean of its divisors is an integer number (91241990).

Almost surely, 2^1138587275 is an apocalyptic number.

1138587275 is a deficient number, since it is larger than the sum of its proper divisors (503768545).

1138587275 is an equidigital number, since it uses as much as digits as its factorization.

1138587275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929483 (or 929471 counting only the distinct ones).

The product of its digits is 470400, while the sum is 47.

The square root of 1138587275 is about 33742.9588951532. The cubic root of 1138587275 is about 1044.2122295624.

The spelling of 1138587275 in words is "one billion, one hundred thirty-eight million, five hundred eighty-seven thousand, two hundred seventy-five".