1345815844 has 12 divisors (see below), whose sum is σ = 2356195968. Its totient is φ = 672617000.

The previous prime is 1345815841. The next prime is 1345815871. The reversal of 1345815844 is 4485185431.

It is a super-2 number, since 2×1345815844² = 3622440571922864672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1345815844.

It is not an unprimeable number, because it can be changed into a prime (1345815841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62152 + ... + 80959.

It is an arithmetic number, because the mean of its divisors is an integer number (196349664).

Almost surely, 2^1345815844 is an apocalyptic number.

It is an amenable number.

1345815844 is a deficient number, since it is larger than the sum of its proper divisors (1010380124).

1345815844 is a wasteful number, since it uses less digits than its factorization.

1345815844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145466 (or 145464 counting only the distinct ones).

The product of its digits is 307200, while the sum is 43.

The square root of 1345815844 is about 36685.3628031672. The cubic root of 1345815844 is about 1104.0664484702.

The spelling of 1345815844 in words is "one billion, three hundred forty-five million, eight hundred fifteen thousand, eight hundred forty-four".