1165094280 has 320 divisors, whose sum is σ = 4574845440. Its totient is φ = 260402688.

The previous prime is 1165094267. The next prime is 1165094321. The reversal of 1165094280 is 824905611.

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

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, 1065414 + ... + 1066506.

It is an arithmetic number, because the mean of its divisors is an integer number (14296392).

Almost surely, 2^1165094280 is an apocalyptic number.

1165094280 is a gapful number since it is divisible by the number (10) 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 1165094280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2287422720).

1165094280 is an abundant number, since it is smaller than the sum of its proper divisors (3409751160).

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

1165094280 is a wasteful number, since it uses less digits than its factorization.

1165094280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170 (or 1157 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1165094280 is about 34133.4774085501. The cubic root of 1165094280 is about 1052.2534460459.

Adding to 1165094280 its reverse (824905611), we get a palindrome (1989999891).

The spelling of 1165094280 in words is "one billion, one hundred sixty-five million, ninety-four thousand, two hundred eighty".