40445605 has 16 divisors (see below), whose sum is σ = 49638960. Its totient is φ = 31629312.

The previous prime is 40445599. The next prime is 40445609. The reversal of 40445605 is 50654404.

40445605 = T₃₇₅ + T₃₇₆ + ... + T₆₆₅.

It can be written as a sum of positive squares in 8 ways, for example, as 10666756 + 29778849 = 3266^2 + 5457^2 .

It is a cyclic number.

It is not a de Polignac number, because 40445605 - 2¹⁵ = 40412837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40445609) 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, 42697 + ... + 43633.

It is an arithmetic number, because the mean of its divisors is an integer number (3102435).

Almost surely, 2^40445605 is an apocalyptic number.

It is an amenable number.

40445605 is a deficient number, since it is larger than the sum of its proper divisors (9193355).

40445605 is an equidigital number, since it uses as much as digits as its factorization.

40445605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 40445605 is about 6359.6859199177. The cubic root of 40445605 is about 343.2604588683.

The spelling of 40445605 in words is "forty million, four hundred forty-five thousand, six hundred five".