405778895 has 8 divisors (see below), whose sum is σ = 493605456. Its totient is φ = 320175936.

The previous prime is 405778853. The next prime is 405778897. The reversal of 405778895 is 598877504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405778895 - 2¹⁶ = 405713359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405778897) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 555497 + ... + 556226.

It is an arithmetic number, because the mean of its divisors is an integer number (61700682).

Almost surely, 2^405778895 is an apocalyptic number.

405778895 is a deficient number, since it is larger than the sum of its proper divisors (87826561).

405778895 is a wasteful number, since it uses less digits than its factorization.

405778895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111801.

The product of its (nonzero) digits is 2822400, while the sum is 53.

The square root of 405778895 is about 20143.9543039593. The cubic root of 405778895 is about 740.3376198624.

The spelling of 405778895 in words is "four hundred five million, seven hundred seventy-eight thousand, eight hundred ninety-five".