1840393187848 has 32 divisors (see below), whose sum is σ = 3546052859160. Its totient is φ = 894920696320.

The previous prime is 1840393187839. The next prime is 1840393187849. The reversal of 1840393187848 is 8487813930481.

It can be written as a sum of positive squares in 4 ways, for example, as 522668269764 + 1317724918084 = 722958^2 + 1147922^2 .

It is a super-2 number, since 2×1840393187848² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1840393187848.

It is not an unprimeable number, because it can be changed into a prime (1840393187849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8746111 + ... + 8954062.

Almost surely, 2^{1840393187848} is an apocalyptic number.

It is an amenable number.

1840393187848 is a deficient number, since it is larger than the sum of its proper divisors (1705659671312).

1840393187848 is a wasteful number, since it uses less digits than its factorization.

1840393187848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17700537 (or 17700533 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 64.

The spelling of 1840393187848 in words is "one trillion, eight hundred forty billion, three hundred ninety-three million, one hundred eighty-seven thousand, eight hundred forty-eight".