1093978644 has 24 divisors (see below), whose sum is σ = 2784673248. Its totient is φ = 331508640.

The previous prime is 1093978643. The next prime is 1093978681. The reversal of 1093978644 is 4468793901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1093978643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4143727 + ... + 4143990.

It is an arithmetic number, because the mean of its divisors is an integer number (116028052).

Almost surely, 2^1093978644 is an apocalyptic number.

It is an amenable number.

1093978644 is an abundant number, since it is smaller than the sum of its proper divisors (1690694604).

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

1093978644 is a wasteful number, since it uses less digits than its factorization.

1093978644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8287735 (or 8287733 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 1093978644 is about 33075.3479800289. The cubic root of 1093978644 is about 1030.3931147809.

The spelling of 1093978644 in words is "one billion, ninety-three million, nine hundred seventy-eight thousand, six hundred forty-four".