405406479 has 8 divisors (see below), whose sum is σ = 544798720. Its totient is φ = 268142616.

The previous prime is 405406471. The next prime is 405406489. The reversal of 405406479 is 974604504.

It is a happy number.

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

It is not a de Polignac number, because 405406479 - 2³ = 405406471 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 (405406471) 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 7 ways as a sum of consecutive naturals, for example, 531649 + ... + 532410.

It is an arithmetic number, because the mean of its divisors is an integer number (68099840).

Almost surely, 2^405406479 is an apocalyptic number.

405406479 is a deficient number, since it is larger than the sum of its proper divisors (139392241).

405406479 is a wasteful number, since it uses less digits than its factorization.

405406479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064189.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 405406479 is about 20134.7083167351. The cubic root of 405406479 is about 740.1110613682. Note that the first 3 decimals are identical.

The spelling of 405406479 in words is "four hundred five million, four hundred six thousand, four hundred seventy-nine".