1065647328 has 96 divisors (see below), whose sum is σ = 2905854336. Its totient is φ = 341687808.

The previous prime is 1065647299. The next prime is 1065647381. The reversal of 1065647328 is 8237465601.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×1065647328³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1065647328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274650 + ... + 278502.

It is an arithmetic number, because the mean of its divisors is an integer number (30269316).

Almost surely, 2^1065647328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1065647328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452927168).

1065647328 is an abundant number, since it is smaller than the sum of its proper divisors (1840207008).

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

1065647328 is a wasteful number, since it uses less digits than its factorization.

1065647328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976 (or 3968 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 1065647328 is about 32644.2541345334. The cubic root of 1065647328 is about 1021.4203357786.

The spelling of 1065647328 in words is "one billion, sixty-five million, six hundred forty-seven thousand, three hundred twenty-eight".