1138548836 has 6 divisors (see below), whose sum is σ = 1992460470. Its totient is φ = 569274416.

The previous prime is 1138548781. The next prime is 1138548857. The reversal of 1138548836 is 6388458311.

It can be written as a sum of positive squares in only one way, i.e., 637057600 + 501491236 = 25240^2 + 22394^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142318601 + ... + 142318608.

It is an arithmetic number, because the mean of its divisors is an integer number (332076745).

Almost surely, 2^1138548836 is an apocalyptic number.

It is an amenable number.

1138548836 is a deficient number, since it is larger than the sum of its proper divisors (853911634).

1138548836 is a wasteful number, since it uses less digits than its factorization.

1138548836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284637213 (or 284637211 counting only the distinct ones).

The product of its digits is 552960, while the sum is 47.

The square root of 1138548836 is about 33742.3893048492. The cubic root of 1138548836 is about 1044.2004784721.

The spelling of 1138548836 in words is "one billion, one hundred thirty-eight million, five hundred forty-eight thousand, eight hundred thirty-six".