3988268215440 has 40 divisors (see below), whose sum is σ = 12363631468608. Its totient is φ = 1063538190720.

The previous prime is 3988268215439. The next prime is 3988268215471. The reversal of 3988268215440 is 445128628893.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8308891876 + ... + 8308892355.

Almost surely, 2^{3988268215440} is an apocalyptic number.

3988268215440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3988268215440 is an abundant number, since it is smaller than the sum of its proper divisors (8375363253168).

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

3988268215440 is a wasteful number, since it uses less digits than its factorization.

3988268215440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16617784247 (or 16617784241 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 60.

The spelling of 3988268215440 in words is "three trillion, nine hundred eighty-eight billion, two hundred sixty-eight million, two hundred fifteen thousand, four hundred forty".