1152120440 has 16 divisors (see below), whose sum is σ = 2592271080. Its totient is φ = 460848160.

The previous prime is 1152120421. The next prime is 1152120443. The reversal of 1152120440 is 440212511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152120443) 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, 14401466 + ... + 14401545.

Almost surely, 2^1152120440 is an apocalyptic number.

1152120440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1152120440 is an abundant number, since it is smaller than the sum of its proper divisors (1440150640).

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

1152120440 is a wasteful number, since it uses less digits than its factorization.

1152120440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28803022 (or 28803018 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1152120440 is about 33942.8996993480. The cubic root of 1152120440 is about 1048.3330890602. Note that the first 3 decimals are identical.

Adding to 1152120440 its reverse (440212511), we get a palindrome (1592332951).

The spelling of 1152120440 in words is "one billion, one hundred fifty-two million, one hundred twenty thousand, four hundred forty".