1138564544 has 28 divisors (see below), whose sum is σ = 2433136104. Its totient is φ = 525490944.

The previous prime is 1138564529. The next prime is 1138564549. The reversal of 1138564544 is 4454658311.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138564549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683402 + ... + 685065.

It is an arithmetic number, because the mean of its divisors is an integer number (86897718).

Almost surely, 2^1138564544 is an apocalyptic number.

It is an amenable number.

1138564544 is an abundant number, since it is smaller than the sum of its proper divisors (1294571560).

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

1138564544 is a wasteful number, since it uses less digits than its factorization.

1138564544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368492 (or 1368482 counting only the distinct ones).

The product of its digits is 230400, while the sum is 41.

The square root of 1138564544 is about 33742.6220676461. The cubic root of 1138564544 is about 1044.2052805573.

The spelling of 1138564544 in words is "one billion, one hundred thirty-eight million, five hundred sixty-four thousand, five hundred forty-four".