1844401345 has 24 divisors (see below), whose sum is σ = 2399120424. Its totient is φ = 1360032768.

The previous prime is 1844401331. The next prime is 1844401369. The reversal of 1844401345 is 5431044481.

It can be written as a sum of positive squares in 4 ways, for example, as 52403121 + 1791998224 = 7239^2 + 42332^2 .

It is not a de Polignac number, because 1844401345 - 2⁷ = 1844401217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1844401345.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52977 + ... + 80593.

It is an arithmetic number, because the mean of its divisors is an integer number (99963351).

Almost surely, 2^1844401345 is an apocalyptic number.

It is an amenable number.

1844401345 is a deficient number, since it is larger than the sum of its proper divisors (554719079).

1844401345 is a wasteful number, since it uses less digits than its factorization.

1844401345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27697 (or 27678 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 1844401345 is about 42946.4939779722. The cubic root of 1844401345 is about 1226.3614118731.

The spelling of 1844401345 in words is "one billion, eight hundred forty-four million, four hundred one thousand, three hundred forty-five".