1088778538 has 4 divisors (see below), whose sum is σ = 1633167810. Its totient is φ = 544389268.

The previous prime is 1088778517. The next prime is 1088778541. The reversal of 1088778538 is 8358778801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8358778801 = 151 ⋅55356151.

It can be written as a sum of positive squares in only one way, i.e., 1086163849 + 2614689 = 32957^2 + 1617^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272194633 + ... + 272194636.

Almost surely, 2^1088778538 is an apocalyptic number.

1088778538 is a deficient number, since it is larger than the sum of its proper divisors (544389272).

1088778538 is an equidigital number, since it uses as much as digits as its factorization.

1088778538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544389271.

The product of its (nonzero) digits is 3010560, while the sum is 55.

The square root of 1088778538 is about 32996.6443445390. The cubic root of 1088778538 is about 1028.7579013531.

The spelling of 1088778538 in words is "one billion, eighty-eight million, seven hundred seventy-eight thousand, five hundred thirty-eight".