400319605 has 8 divisors (see below), whose sum is σ = 549009792. Its totient is φ = 274504848.

The previous prime is 400319603. The next prime is 400319609. The reversal of 400319605 is 506913004.

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 400319605 - 2¹ = 400319603 is a prime.

It is a super-2 number, since 2×400319605² = 320511572294712050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400319603) 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, 5718817 + ... + 5718886.

It is an arithmetic number, because the mean of its divisors is an integer number (68626224).

Almost surely, 2^400319605 is an apocalyptic number.

It is an amenable number.

400319605 is a deficient number, since it is larger than the sum of its proper divisors (148690187).

400319605 is a wasteful number, since it uses less digits than its factorization.

400319605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11437715.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 400319605 is about 20007.9885295849. The cubic root of 400319605 is about 737.0024866333.

The spelling of 400319605 in words is "four hundred million, three hundred nineteen thousand, six hundred five".