1065115440 has 80 divisors (see below), whose sum is σ = 3668738400. Its totient is φ = 284030208.

The previous prime is 1065115427. The next prime is 1065115477. The reversal of 1065115440 is 445115601.

1065115440 is a `hidden beast` number, since 1 + 0 + 651 + 1 + 5 + 4 + 4 + 0 = 666.

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

It is a super-2 number, since 2×1065115440² = 2268941801052787200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244395 + ... + 248714.

It is an arithmetic number, because the mean of its divisors is an integer number (45859230).

Almost surely, 2^1065115440 is an apocalyptic number.

1065115440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1065115440 is an abundant number, since it is smaller than the sum of its proper divisors (2603622960).

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

1065115440 is a wasteful number, since it uses less digits than its factorization.

1065115440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493131 (or 493119 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1065115440 is about 32636.1063854131. The cubic root of 1065115440 is about 1021.2503697188.

The spelling of 1065115440 in words is "one billion, sixty-five million, one hundred fifteen thousand, four hundred forty".