40671605 has 16 divisors (see below), whose sum is σ = 52865904. Its totient is φ = 29859840.

The previous prime is 40671581. The next prime is 40671607. The reversal of 40671605 is 50617604.

It can be written as a sum of positive squares in 8 ways, for example, as 26481316 + 14190289 = 5146^2 + 3767^2 .

It is not a de Polignac number, because 40671605 - 2¹⁴ = 40655221 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40671607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10037 + ... + 13493.

It is an arithmetic number, because the mean of its divisors is an integer number (3304119).

Almost surely, 2^40671605 is an apocalyptic number.

It is an amenable number.

40671605 is a deficient number, since it is larger than the sum of its proper divisors (12194299).

40671605 is a wasteful number, since it uses less digits than its factorization.

40671605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 40671605 is about 6377.4293410433. The cubic root of 40671605 is about 343.8986231152.

The spelling of 40671605 in words is "forty million, six hundred seventy-one thousand, six hundred five".