40156 has 6 divisors (see below), whose sum is σ = 70280. Its totient is φ = 20076.

The previous prime is 40153. The next prime is 40163. The reversal of 40156 is 65104.

It is a super-2 number, since 2×40156² = 3225008672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5016 + ... + 5023.

2⁴⁰¹⁵⁶ is an apocalyptic number.

It is an amenable number.

40156 is a deficient number, since it is larger than the sum of its proper divisors (30124).

40156 is a wasteful number, since it uses less digits than its factorization.

40156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10043 (or 10041 counting only the distinct ones).

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

The square root of 40156 is about 200.3896204897. The cubic root of 40156 is about 34.2439206359.

It can be divided in two parts, 4015 and 6, that multiplied together give a triangular number (24090 = T₂₁₉).

The spelling of 40156 in words is "forty thousand, one hundred fifty-six".