1144478394 has 36 divisors (see below), whose sum is σ = 2515319898. Its totient is φ = 376089840.

The previous prime is 1144478371. The next prime is 1144478441. The reversal of 1144478394 is 4938744411.

1144478394 is a `hidden beast` number, since 1 + 144 + 478 + 39 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1007237169 + 137241225 = 31737^2 + 11715^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 84432 + ... + 97044.

Almost surely, 2^1144478394 is an apocalyptic number.

1144478394 is an abundant number, since it is smaller than the sum of its proper divisors (1370841504).

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

1144478394 is a wasteful number, since it uses less digits than its factorization.

1144478394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12763 (or 12689 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 1144478394 is about 33830.1403189523. The cubic root of 1144478394 is about 1046.0100713519.

The spelling of 1144478394 in words is "one billion, one hundred forty-four million, four hundred seventy-eight thousand, three hundred ninety-four".