1165969728 has 560 divisors, whose sum is σ = 4531912704. Its totient is φ = 287400960.

The previous prime is 1165969697. The next prime is 1165969747. The reversal of 1165969728 is 8279695611.

It is a super-2 number, since 2×1165969728² = 2718970813224787968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (1632960) is a multiple of the sum of its prime factors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9180801 + ... + 9180927.

Almost surely, 2^1165969728 is an apocalyptic number.

1165969728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165969728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2265956352).

1165969728 is an abundant number, since it is smaller than the sum of its proper divisors (3365942976).

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

1165969728 is a wasteful number, since it uses less digits than its factorization.

1165969728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 173 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 1165969728 is about 34146.2988916808. The cubic root of 1165969728 is about 1052.5169333189.

The spelling of 1165969728 in words is "one billion, one hundred sixty-five million, nine hundred sixty-nine thousand, seven hundred twenty-eight".