1440145552 has 40 divisors (see below), whose sum is σ = 2921134464. Its totient is φ = 686509824.

The previous prime is 1440145477. The next prime is 1440145559. The reversal of 1440145552 is 2555410441.

It is a happy number.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1440145559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108933 + ... + 121435.

Almost surely, 2^1440145552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440145552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1460567232).

1440145552 is an abundant number, since it is smaller than the sum of its proper divisors (1480988912).

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

1440145552 is a wasteful number, since it uses less digits than its factorization.

1440145552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12847 (or 12841 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 1440145552 is about 37949.2496895525. The cubic root of 1440145552 is about 1129.2812805076.

Adding to 1440145552 its reverse (2555410441), we get a palindrome (3995555993).

The spelling of 1440145552 in words is "one billion, four hundred forty million, one hundred forty-five thousand, five hundred fifty-two".