1087828138 has 4 divisors (see below), whose sum is σ = 1631742210. Its totient is φ = 543914068.

The previous prime is 1087828123. The next prime is 1087828141. The reversal of 1087828138 is 8318287801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8318287801 = 23 ⋅361664687.

It can be written as a sum of positive squares in only one way, i.e., 1024832169 + 62995969 = 32013^2 + 7937^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271957033 + ... + 271957036.

Almost surely, 2^1087828138 is an apocalyptic number.

1087828138 is a deficient number, since it is larger than the sum of its proper divisors (543914072).

1087828138 is an equidigital number, since it uses as much as digits as its factorization.

1087828138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543914071.

The product of its (nonzero) digits is 172032, while the sum is 46.

The square root of 1087828138 is about 32982.2397359549. The cubic root of 1087828138 is about 1028.4584783139.

The spelling of 1087828138 in words is "one billion, eighty-seven million, eight hundred twenty-eight thousand, one hundred thirty-eight".