1135440864 has 36 divisors (see below), whose sum is σ = 3228910776. Its totient is φ = 378480192.

The previous prime is 1135440847. The next prime is 1135440869. The reversal of 1135440864 is 4680445311.

1135440864 is a `hidden beast` number, since 1 + 135 + 440 + 86 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135440869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1970964 + ... + 1971539.

It is an arithmetic number, because the mean of its divisors is an integer number (89691966).

Almost surely, 2^1135440864 is an apocalyptic number.

It is an amenable number.

1135440864 is an abundant number, since it is smaller than the sum of its proper divisors (2093469912).

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

1135440864 is a wasteful number, since it uses less digits than its factorization.

1135440864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942519 (or 3942508 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 1135440864 is about 33696.3034174373. The cubic root of 1135440864 is about 1043.2494715865.

The spelling of 1135440864 in words is "one billion, one hundred thirty-five million, four hundred forty thousand, eight hundred sixty-four".