40446609 has 12 divisors (see below), whose sum is σ = 62733744. Its totient is φ = 23112264.

The previous prime is 40446589. The next prime is 40446613. The reversal of 40446609 is 90664404.

It is not a de Polignac number, because 40446609 - 2¹⁷ = 40315537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40446609.

It is not an unprimeable number, because it can be changed into a prime (40446409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137427 + ... + 137720.

It is an arithmetic number, because the mean of its divisors is an integer number (5227812).

Almost surely, 2^40446609 is an apocalyptic number.

40446609 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

40446609 is a deficient number, since it is larger than the sum of its proper divisors (22287135).

40446609 is a wasteful number, since it uses less digits than its factorization.

40446609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275164 (or 275157 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 40446609 is about 6359.7648541436. The cubic root of 40446609 is about 343.2632991493.

The spelling of 40446609 in words is "forty million, four hundred forty-six thousand, six hundred nine".