4000188 has 12 divisors (see below), whose sum is σ = 9333800. Its totient is φ = 1333392.

The previous prime is 4000169. The next prime is 4000189. The reversal of 4000188 is 8810004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000189) 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, 166663 + ... + 166686.

Almost surely, 2^4000188 is an apocalyptic number.

It is an amenable number.

4000188 is an abundant number, since it is smaller than the sum of its proper divisors (5333612).

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

4000188 is a wasteful number, since it uses less digits than its factorization.

4000188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333356 (or 333354 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 4000188 is about 2000.0469994478. The cubic root of 4000188 is about 158.7425920862.

The spelling of 4000188 in words is "four million, one hundred eighty-eight", and thus it is an aban number.