4001002788 has 12 divisors (see below), whose sum is σ = 9335673200. Its totient is φ = 1333667592.

The previous prime is 4001002783. The next prime is 4001002861. The reversal of 4001002788 is 8872001004.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (4001002783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166708438 + ... + 166708461.

Almost surely, 2^4001002788 is an apocalyptic number.

It is an amenable number.

4001002788 is an abundant number, since it is smaller than the sum of its proper divisors (5334670412).

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

4001002788 is a wasteful number, since it uses less digits than its factorization.

4001002788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333416906 (or 333416904 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 4001002788 is about 63253.4804417907. The cubic root of 4001002788 is about 1587.5336931117.

The spelling of 4001002788 in words is "four billion, one million, two thousand, seven hundred eighty-eight".