1131433440 has 48 divisors (see below), whose sum is σ = 3564016848. Its totient is φ = 301715456.

The previous prime is 1131433439. The next prime is 1131433477. The reversal of 1131433440 is 443341311.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1131433440.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1178097 + ... + 1179056.

It is an arithmetic number, because the mean of its divisors is an integer number (74250351).

Almost surely, 2^1131433440 is an apocalyptic number.

1131433440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131433440 is an abundant number, since it is smaller than the sum of its proper divisors (2432583408).

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

1131433440 is a wasteful number, since it uses less digits than its factorization.

1131433440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357171 (or 2357163 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1131433440 is about 33636.7870047066. The cubic root of 1131433440 is about 1042.0206768885.

Adding to 1131433440 its reverse (443341311), we get a palindrome (1574774751).

The spelling of 1131433440 in words is "one billion, one hundred thirty-one million, four hundred thirty-three thousand, four hundred forty".