1152003440 has 80 divisors (see below), whose sum is σ = 3222174720. Its totient is φ = 374181120.

The previous prime is 1152003439. The next prime is 1152003443. The reversal of 1152003440 is 443002511.

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

It is a super-2 number, since 2×1152003440² = 2654223851543667200, which contains 22 as substring.

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 (1152003443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43496 + ... + 64775.

It is an arithmetic number, because the mean of its divisors is an integer number (40277184).

Almost surely, 2^1152003440 is an apocalyptic number.

1152003440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1152003440 is an abundant number, since it is smaller than the sum of its proper divisors (2070171280).

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

1152003440 is a wasteful number, since it uses less digits than its factorization.

1152003440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108310 (or 108304 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1152003440 is about 33941.1761729024. The cubic root of 1152003440 is about 1048.2976011259.

Adding to 1152003440 its reverse (443002511), we get a palindrome (1595005951).

The spelling of 1152003440 in words is "one billion, one hundred fifty-two million, three thousand, four hundred forty".