4000988 has 24 divisors (see below), whose sum is σ = 7379232. Its totient is φ = 1894464.

The previous prime is 4000987. The next prime is 4000993. The reversal of 4000988 is 8890004.

It is a super-2 number, since 2×4000988² = 32015809952288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4000988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14306 + ... + 14582.

It is an arithmetic number, because the mean of its divisors is an integer number (307468).

Almost surely, 2^4000988 is an apocalyptic number.

It is an amenable number.

4000988 is a deficient number, since it is larger than the sum of its proper divisors (3378244).

4000988 is a wasteful number, since it uses less digits than its factorization.

4000988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 4000988 is about 2000.2469847496. The cubic root of 4000988 is about 158.7531737229.

The spelling of 4000988 in words is "four million, nine hundred eighty-eight", and thus it is an aban number.