1152023440 has 20 divisors (see below), whose sum is σ = 2678454684. Its totient is φ = 460809344.

The previous prime is 1152023437. The next prime is 1152023441. The reversal of 1152023440 is 443202511.

It can be written as a sum of positive squares in 2 ways, for example, as 781537936 + 370485504 = 27956^2 + 19248^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1152023441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7200067 + ... + 7200226.

Almost surely, 2^1152023440 is an apocalyptic number.

1152023440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1152023440 is an abundant number, since it is smaller than the sum of its proper divisors (1526431244).

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

1152023440 is a wasteful number, since it uses less digits than its factorization.

1152023440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14400306 (or 14400300 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1152023440 is about 33941.4707990093. The cubic root of 1152023440 is about 1048.3036676097.

Adding to 1152023440 its reverse (443202511), we get a palindrome (1595225951).

The spelling of 1152023440 in words is "one billion, one hundred fifty-two million, twenty-three thousand, four hundred forty".