1840430538648 has 256 divisors, whose sum is σ = 5799756480000. Its totient is φ = 536071841280.

The previous prime is 1840430538647. The next prime is 1840430538719. The reversal of 1840430538648 is 8468350340481.

It is a happy number.

1840430538648 is a `hidden beast` number, since 1 + 8 + 4 + 0 + 43 + 0 + 538 + 64 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1840430538594 and 1840430538603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840430538647) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 73666623 + ... + 73691601.

It is an arithmetic number, because the mean of its divisors is an integer number (22655298750).

Almost surely, 2^{1840430538648} is an apocalyptic number.

1840430538648 is a gapful number since it is divisible by the number (18) 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 1840430538648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2899878240000).

1840430538648 is an abundant number, since it is smaller than the sum of its proper divisors (3959325941352).

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

1840430538648 is a wasteful number, since it uses less digits than its factorization.

1840430538648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26407 (or 26397 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 54.

The spelling of 1840430538648 in words is "one trillion, eight hundred forty billion, four hundred thirty million, five hundred thirty-eight thousand, six hundred forty-eight".