1781995488 has 384 divisors, whose sum is σ = 6218311680. Its totient is φ = 436101120.

The previous prime is 1781995487. The next prime is 1781995519. The reversal of 1781995488 is 8845991871.

It is a happy number.

1781995488 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1781995483) 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, 25098493 + ... + 25098563.

It is an arithmetic number, because the mean of its divisors is an integer number (16193520).

Almost surely, 2^1781995488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1781995488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3109155840).

1781995488 is an abundant number, since it is smaller than the sum of its proper divisors (4436316192).

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

1781995488 is a wasteful number, since it uses less digits than its factorization.

1781995488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 113 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 60.

The square root of 1781995488 is about 42213.6883960641. The cubic root of 1781995488 is about 1212.3709829493.

The spelling of 1781995488 in words is "one billion, seven hundred eighty-one million, nine hundred ninety-five thousand, four hundred eighty-eight".