1139945544 has 48 divisors (see below), whose sum is σ = 3115698300. Its totient is φ = 376493184.

The previous prime is 1139945539. The next prime is 1139945561. The reversal of 1139945544 is 4455499311.

1139945544 is a `hidden beast` number, since 1 + 1 + 3 + 9 + 94 + 554 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1139872644 + 72900 = 33762^2 + 270^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1139945544.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64779 + ... + 80474.

Almost surely, 2^1139945544 is an apocalyptic number.

It is an amenable number.

1139945544 is an abundant number, since it is smaller than the sum of its proper divisors (1975752756).

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

1139945544 is a wasteful number, since it uses less digits than its factorization.

1139945544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145374 (or 145367 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 1139945544 is about 33763.0795988755. The cubic root of 1139945544 is about 1044.6272928938.

The spelling of 1139945544 in words is "one billion, one hundred thirty-nine million, nine hundred forty-five thousand, five hundred forty-four".