405858449 has 4 divisors (see below), whose sum is σ = 427219440. Its totient is φ = 384497460.

The previous prime is 405858443. The next prime is 405858457. The reversal of 405858449 is 944858504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405858449 - 2¹⁶ = 405792913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405858443) 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 3 ways as a sum of consecutive naturals, for example, 10680467 + ... + 10680504.

It is an arithmetic number, because the mean of its divisors is an integer number (106804860).

Almost surely, 2^405858449 is an apocalyptic number.

It is an amenable number.

405858449 is a deficient number, since it is larger than the sum of its proper divisors (21360991).

405858449 is a wasteful number, since it uses less digits than its factorization.

405858449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21360990.

The product of its (nonzero) digits is 921600, while the sum is 47.

The square root of 405858449 is about 20145.9288443100. The cubic root of 405858449 is about 740.3859984016.

The spelling of 405858449 in words is "four hundred five million, eight hundred fifty-eight thousand, four hundred forty-nine".