1144664436 has 24 divisors (see below), whose sum is σ = 2676844800. Its totient is φ = 380703232.

The previous prime is 1144664431. The next prime is 1144664471. The reversal of 1144664436 is 6344664411.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1144664394 and 1144664403.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100836 + ... + 111611.

It is an arithmetic number, because the mean of its divisors is an integer number (111535200).

Almost surely, 2^1144664436 is an apocalyptic number.

It is an amenable number.

1144664436 is an abundant number, since it is smaller than the sum of its proper divisors (1532180364).

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

1144664436 is a wasteful number, since it uses less digits than its factorization.

1144664436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212903 (or 212901 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 1144664436 is about 33832.8898558784. The cubic root of 1144664436 is about 1046.0667467372.

The spelling of 1144664436 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, four hundred thirty-six".