1169173728 has 72 divisors (see below), whose sum is σ = 3332340648. Its totient is φ = 388845312.

The previous prime is 1169173727. The next prime is 1169173751. The reversal of 1169173728 is 8273719611.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1169173727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130150 + ... + 138842.

It is an arithmetic number, because the mean of its divisors is an integer number (46282509).

Almost surely, 2^1169173728 is an apocalyptic number.

1169173728 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 1169173728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666170324).

1169173728 is an abundant number, since it is smaller than the sum of its proper divisors (2163166920).

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

1169173728 is a wasteful number, since it uses less digits than its factorization.

1169173728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9176 (or 9165 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1169173728 is about 34193.1824783830. The cubic root of 1169173728 is about 1053.4801315816.

The spelling of 1169173728 in words is "one billion, one hundred sixty-nine million, one hundred seventy-three thousand, seven hundred twenty-eight".