1165474440 has 512 divisors, whose sum is σ = 4681152000. Its totient is φ = 254803968.

The previous prime is 1165474391. The next prime is 1165474441. The reversal of 1165474440 is 444745611.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1165474395 and 1165474404.

It is not an unprimeable number, because it can be changed into a prime (1165474441) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4534792 + ... + 4535048.

It is an arithmetic number, because the mean of its divisors is an integer number (9142875).

Almost surely, 2^1165474440 is an apocalyptic number.

1165474440 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 1165474440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2340576000).

1165474440 is an abundant number, since it is smaller than the sum of its proper divisors (3515677560).

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

1165474440 is a wasteful number, since it uses less digits than its factorization.

1165474440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 1165474440 is about 34139.0456808623. The cubic root of 1165474440 is about 1052.3678806105.

The spelling of 1165474440 in words is "one billion, one hundred sixty-five million, four hundred seventy-four thousand, four hundred forty".