1144664438 has 4 divisors (see below), whose sum is σ = 1716996660. Its totient is φ = 572332218.

The previous prime is 1144664431. The next prime is 1144664471. The reversal of 1144664438 is 8344664411.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1144664395 and 1144664404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144664431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286166108 + ... + 286166111.

It is an arithmetic number, because the mean of its divisors is an integer number (429249165).

Almost surely, 2^1144664438 is an apocalyptic number.

1144664438 is a deficient number, since it is larger than the sum of its proper divisors (572332222).

1144664438 is an equidigital number, since it uses as much as digits as its factorization.

1144664438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572332221.

The product of its digits is 221184, while the sum is 41.

The square root of 1144664438 is about 33832.8898854354. The cubic root of 1144664438 is about 1046.0667473465.

The spelling of 1144664438 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, four hundred thirty-eight".