405379805 has 8 divisors (see below), whose sum is σ = 488213592. Its totient is φ = 323131968.

The previous prime is 405379789. The next prime is 405379837. The reversal of 405379805 is 508973504.

It can be written as a sum of positive squares in 4 ways, for example, as 70526404 + 334853401 = 8398^2 + 18299^2 .

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 405379805 - 2⁴ = 405379789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144962 + ... + 147731.

It is an arithmetic number, because the mean of its divisors is an integer number (61026699).

Almost surely, 2^405379805 is an apocalyptic number.

It is an amenable number.

405379805 is a deficient number, since it is larger than the sum of its proper divisors (82833787).

405379805 is a wasteful number, since it uses less digits than its factorization.

405379805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292975.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 405379805 is about 20134.0459173014. The cubic root of 405379805 is about 740.0948289723.

The spelling of 405379805 in words is "four hundred five million, three hundred seventy-nine thousand, eight hundred five".