405968774 has 4 divisors (see below), whose sum is σ = 608953164. Its totient is φ = 202984386.

The previous prime is 405968749. The next prime is 405968779. The reversal of 405968774 is 477869504.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405968779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101492192 + ... + 101492195.

It is an arithmetic number, because the mean of its divisors is an integer number (152238291).

Almost surely, 2^405968774 is an apocalyptic number.

405968774 is a deficient number, since it is larger than the sum of its proper divisors (202984390).

405968774 is a wasteful number, since it uses less digits than its factorization.

405968774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202984389.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 405968774 is about 20148.6668045308. Note that the first 3 decimals coincide. The cubic root of 405968774 is about 740.4530790018.

The spelling of 405968774 in words is "four hundred five million, nine hundred sixty-eight thousand, seven hundred seventy-four".