1152271440 has 80 divisors (see below), whose sum is σ = 3968942400. Its totient is φ = 307271808.

The previous prime is 1152271433. The next prime is 1152271447. The reversal of 1152271440 is 441722511.

1152271440 is a `hidden beast` number, since 1 + 152 + 2 + 71 + 440 = 666.

It is an interprime number because it is at equal distance from previous prime (1152271433) and next prime (1152271447).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152271447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264570 + ... + 268889.

It is an arithmetic number, because the mean of its divisors is an integer number (49611780).

Almost surely, 2^1152271440 is an apocalyptic number.

1152271440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1152271440 is an abundant number, since it is smaller than the sum of its proper divisors (2816670960).

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

1152271440 is a wasteful number, since it uses less digits than its factorization.

1152271440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533481 (or 533469 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1152271440 is about 33945.1239502819. The cubic root of 1152271440 is about 1048.3788861765.

Adding to 1152271440 its reverse (441722511), we get a palindrome (1593993951).

The spelling of 1152271440 in words is "one billion, one hundred fifty-two million, two hundred seventy-one thousand, four hundred forty".