4000156 has 6 divisors (see below), whose sum is σ = 7000280. Its totient is φ = 2000076.

The previous prime is 4000153. The next prime is 4000159. The reversal of 4000156 is 6510004.

4000156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4000153) and next prime (4000159).

4000156 is a modest number, since divided by 156 gives 4 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500016 + ... + 500023.

Almost surely, 2^4000156 is an apocalyptic number.

It is an amenable number.

4000156 is a deficient number, since it is larger than the sum of its proper divisors (3000124).

4000156 is a wasteful number, since it uses less digits than its factorization.

4000156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000043 (or 1000041 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 4000156 is about 2000.0389996198. The cubic root of 4000156 is about 158.7421687914.

The spelling of 4000156 in words is "four million, one hundred fifty-six", and thus it is an aban number.