40556 has 6 divisors (see below), whose sum is σ = 70980. Its totient is φ = 20276.

The previous prime is 40543. The next prime is 40559. The reversal of 40556 is 65504.

It is not an unprimeable number, because it can be changed into a prime (40559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5066 + ... + 5073.

It is an arithmetic number, because the mean of its divisors is an integer number (11830).

2⁴⁰⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

40556 is a deficient number, since it is larger than the sum of its proper divisors (30424).

40556 is a wasteful number, since it uses less digits than its factorization.

40556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10143 (or 10141 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 40556 is about 201.3852030314. The cubic root of 40556 is about 34.3572481345.

The spelling of 40556 in words is "forty thousand, five hundred fifty-six".