40645727 has 4 divisors (see below), whose sum is σ = 40915056. Its totient is φ = 40376400.

The previous prime is 40645723. The next prime is 40645729. The reversal of 40645727 is 72754604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40645727 - 2² = 40645723 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40645723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134438 + ... + 134739.

It is an arithmetic number, because the mean of its divisors is an integer number (10228764).

Almost surely, 2^40645727 is an apocalyptic number.

40645727 is a deficient number, since it is larger than the sum of its proper divisors (269329).

40645727 is a wasteful number, since it uses less digits than its factorization.

40645727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269328.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 40645727 is about 6375.4001443047. The cubic root of 40645727 is about 343.8256705258.

The spelling of 40645727 in words is "forty million, six hundred forty-five thousand, seven hundred twenty-seven".