40557 has 8 divisors (see below), whose sum is σ = 59040. Its totient is φ = 24560.

The previous prime is 40543. The next prime is 40559. The reversal of 40557 is 75504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40557 - 2⁶ = 40493 is a prime.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 582 + ... + 647.

It is an arithmetic number, because the mean of its divisors is an integer number (7380).

2⁴⁰⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

40557 is a deficient number, since it is larger than the sum of its proper divisors (18483).

40557 is a wasteful number, since it uses less digits than its factorization.

40557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243.

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 40557 is about 201.3876858202. The cubic root of 40557 is about 34.3575305174.

The spelling of 40557 in words is "forty thousand, five hundred fifty-seven".