3981002550 has 288 divisors, whose sum is σ = 12518841600. Its totient is φ = 831479040.

The previous prime is 3981002549. The next prime is 3981002563. The reversal of 3981002550 is 552001893.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4049359 + ... + 4050341.

It is an arithmetic number, because the mean of its divisors is an integer number (43468200).

Almost surely, 2^3981002550 is an apocalyptic number.

3981002550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3981002550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6259420800).

3981002550 is an abundant number, since it is smaller than the sum of its proper divisors (8537839050).

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

3981002550 is a wasteful number, since it uses less digits than its factorization.

3981002550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 3981002550 is about 63095.1864249564. The cubic root of 3981002550 is about 1584.8840153032.

The spelling of 3981002550 in words is "three billion, nine hundred eighty-one million, two thousand, five hundred fifty".