3985654000 has 80 divisors (see below), whose sum is σ = 9769687200. Its totient is φ = 1572364800.

The previous prime is 3985653983. The next prime is 3985654009. The reversal of 3985654000 is 4565893.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985654009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132351 + ... + 159649.

It is an arithmetic number, because the mean of its divisors is an integer number (122121090).

Almost surely, 2^3985654000 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 3985654000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4884843600).

3985654000 is an abundant number, since it is smaller than the sum of its proper divisors (5784033200).

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

3985654000 is a wasteful number, since it uses less digits than its factorization.

3985654000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27395 (or 27379 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 3985654000 is about 63132.0362415153. The cubic root of 3985654000 is about 1585.5010407335.

The spelling of 3985654000 in words is "three billion, nine hundred eighty-five million, six hundred fifty-four thousand".