1135523280 has 80 divisors (see below), whose sum is σ = 3523435200. Its totient is φ = 302521344.

The previous prime is 1135523227. The next prime is 1135523281. The reversal of 1135523280 is 823255311.

1135523280 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135523281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419371 + ... + 422069.

It is an arithmetic number, because the mean of its divisors is an integer number (44042940).

Almost surely, 2^1135523280 is an apocalyptic number.

1135523280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1135523280 is an abundant number, since it is smaller than the sum of its proper divisors (2387911920).

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

1135523280 is a wasteful number, since it uses less digits than its factorization.

1135523280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4468 (or 4462 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1135523280 is about 33697.5263187077. The cubic root of 1135523280 is about 1043.2747124044.

Adding to 1135523280 its reverse (823255311), we get a palindrome (1958778591).

The spelling of 1135523280 in words is "one billion, one hundred thirty-five million, five hundred twenty-three thousand, two hundred eighty".