1165025040 has 80 divisors (see below), whose sum is σ = 3635928000. Its totient is φ = 308578816.

The previous prime is 1165025023. The next prime is 1165025083. The reversal of 1165025040 is 405205611.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1165025040.

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, 19471 + ... + 52049.

It is an arithmetic number, because the mean of its divisors is an integer number (45449100).

Almost surely, 2^1165025040 is an apocalyptic number.

1165025040 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 1165025040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1817964000).

1165025040 is an abundant number, since it is smaller than the sum of its proper divisors (2470902960).

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

1165025040 is a wasteful number, since it uses less digits than its factorization.

1165025040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32744 (or 32738 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1165025040 is about 34132.4631399493. The cubic root of 1165025040 is about 1052.2326009598.

The spelling of 1165025040 in words is "one billion, one hundred sixty-five million, twenty-five thousand, forty".