409878245 has 16 divisors (see below), whose sum is σ = 595185408. Its totient is φ = 264526080.

The previous prime is 409878229. The next prime is 409878263. The reversal of 409878245 is 542878904.

It is a happy number.

It is not a de Polignac number, because 409878245 - 2⁴ = 409878229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 409878245.

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, 343841 + ... + 345030.

It is an arithmetic number, because the mean of its divisors is an integer number (37199088).

Almost surely, 2^409878245 is an apocalyptic number.

It is an amenable number.

409878245 is a deficient number, since it is larger than the sum of its proper divisors (185307163).

409878245 is a wasteful number, since it uses less digits than its factorization.

409878245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688900.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 409878245 is about 20245.4499826504. The cubic root of 409878245 is about 742.8223392313.

The spelling of 409878245 in words is "four hundred nine million, eight hundred seventy-eight thousand, two hundred forty-five".