1144533440 has 56 divisors (see below), whose sum is σ = 2728325760. Its totient is φ = 457325568.

The previous prime is 1144533437. The next prime is 1144533473. The reversal of 1144533440 is 443354411.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533009 + ... + 535151.

Almost surely, 2^1144533440 is an apocalyptic number.

1144533440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1144533440 is an abundant number, since it is smaller than the sum of its proper divisors (1583792320).

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

1144533440 is a wasteful number, since it uses less digits than its factorization.

1144533440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829 (or 3819 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 1144533440 is about 33830.9538736347. The cubic root of 1144533440 is about 1046.0268410721.

Adding to 1144533440 its reverse (443354411), we get a palindrome (1587887851).

The spelling of 1144533440 in words is "one billion, one hundred forty-four million, five hundred thirty-three thousand, four hundred forty".