1144487764 has 12 divisors (see below), whose sum is σ = 2288975584. Its totient is φ = 490494744.

The previous prime is 1144487761. The next prime is 1144487779. The reversal of 1144487764 is 4677844411.

1144487764 is an admirable number.

It is a hoax number, since the sum of its digits (46) 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 (1144487761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20437254 + ... + 20437309.

Almost surely, 2^1144487764 is an apocalyptic number.

1144487764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1144487764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1144487764 is a wasteful number, since it uses less digits than its factorization.

1144487764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40874574 (or 40874572 counting only the distinct ones).

The product of its digits is 602112, while the sum is 46.

The square root of 1144487764 is about 33830.2788046448. The cubic root of 1144487764 is about 1046.0129259529.

The spelling of 1144487764 in words is "one billion, one hundred forty-four million, four hundred eighty-seven thousand, seven hundred sixty-four".