409907645 has 16 divisors (see below), whose sum is σ = 577354368. Its totient is φ = 273481920.

The previous prime is 409907639. The next prime is 409907657. The reversal of 409907645 is 546709904.

It is not a de Polignac number, because 409907645 - 2⁶ = 409907581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 409907596 and 409907605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156971 + ... + 159560.

It is an arithmetic number, because the mean of its divisors is an integer number (36084648).

Almost surely, 2^409907645 is an apocalyptic number.

It is an amenable number.

409907645 is a deficient number, since it is larger than the sum of its proper divisors (167446723).

409907645 is a wasteful number, since it uses less digits than its factorization.

409907645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316580.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 409907645 is about 20246.1760587030. The cubic root of 409907645 is about 742.8400993466.

The spelling of 409907645 in words is "four hundred nine million, nine hundred seven thousand, six hundred forty-five".