1145445040 has 160 divisors (see below), whose sum is σ = 2950525440. Its totient is φ = 411648000.

The previous prime is 1145445031. The next prime is 1145445043. The reversal of 1145445040 is 405445411.

It is not an unprimeable number, because it can be changed into a prime (1145445043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4258026 + ... + 4258294.

It is an arithmetic number, because the mean of its divisors is an integer number (18440784).

Almost surely, 2^1145445040 is an apocalyptic number.

1145445040 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 1145445040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1475262720).

1145445040 is an abundant number, since it is smaller than the sum of its proper divisors (1805080400).

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

1145445040 is a wasteful number, since it uses less digits than its factorization.

1145445040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1145445040 is about 33844.4240606928. The cubic root of 1145445040 is about 1046.3044811372.

The spelling of 1145445040 in words is "one billion, one hundred forty-five million, four hundred forty-five thousand, forty".