408390042878 has 16 divisors (see below), whose sum is σ = 616516059456. Its totient is φ = 202886184480.

The previous prime is 408390042821. The next prime is 408390042887. The reversal of 408390042878 is 878240093804.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174908 + ... + 920528.

It is an arithmetic number, because the mean of its divisors is an integer number (38532253716).

Almost surely, 2^408390042878 is an apocalyptic number.

408390042878 is a deficient number, since it is larger than the sum of its proper divisors (208126016578).

408390042878 is a wasteful number, since it uses less digits than its factorization.

408390042878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747379.

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 408390042878 in words is "four hundred eight billion, three hundred ninety million, forty-two thousand, eight hundred seventy-eight".