40000557 has 8 divisors (see below), whose sum is σ = 53614080. Its totient is φ = 26527040.

The previous prime is 40000549. The next prime is 40000561. The reversal of 40000557 is 75500004.

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 40000557 - 2³ = 40000549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000517) 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, 34332 + ... + 35477.

It is an arithmetic number, because the mean of its divisors is an integer number (6701760).

Almost surely, 2^40000557 is an apocalyptic number.

It is an amenable number.

40000557 is a deficient number, since it is larger than the sum of its proper divisors (13613523).

40000557 is a wasteful number, since it uses less digits than its factorization.

40000557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70003.

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

The square root of 40000557 is about 6324.5993548999. The cubic root of 40000557 is about 341.9967767556.

The spelling of 40000557 in words is "forty million, five hundred fifty-seven", and thus it is an aban number.