3988612544 has 224 divisors, whose sum is σ = 9924288000. Its totient is φ = 1585059840.

The previous prime is 3988612517. The next prime is 3988612567. The reversal of 3988612544 is 4452168893.

It is a tau number, because it is divible by the number of its divisors (224).

Its product of digits (1658880) is a multiple of the sum of its prime factors (256).

It is a junction number, because it is equal to n+sod(n) for n = 3988612492 and 3988612501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30447359 + ... + 30447489.

Almost surely, 2^3988612544 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 3988612544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4962144000).

3988612544 is an abundant number, since it is smaller than the sum of its proper divisors (5935675456).

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

3988612544 is a wasteful number, since it uses less digits than its factorization.

3988612544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 232 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The square root of 3988612544 is about 63155.4632949518. The cubic root of 3988612544 is about 1585.8932485885.

The spelling of 3988612544 in words is "three billion, nine hundred eighty-eight million, six hundred twelve thousand, five hundred forty-four".