400049605 has 8 divisors (see below), whose sum is σ = 481421592. Its totient is φ = 319131648.

The previous prime is 400049581. The next prime is 400049609. The reversal of 400049605 is 506940004.

It can be written as a sum of positive squares in 4 ways, for example, as 145902241 + 254147364 = 12079^2 + 15942^2 .

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 400049605 - 2⁹ = 400049093 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 (400049609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111564 + ... + 115093.

It is an arithmetic number, because the mean of its divisors is an integer number (60177699).

Almost surely, 2^400049605 is an apocalyptic number.

It is an amenable number.

400049605 is a deficient number, since it is larger than the sum of its proper divisors (81371987).

400049605 is a wasteful number, since it uses less digits than its factorization.

400049605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227015.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 400049605 is about 20001.2400865546. The cubic root of 400049605 is about 736.8367561995.

Adding to 400049605 its reverse (506940004), we get a palindrome (906989609).

The spelling of 400049605 in words is "four hundred million, forty-nine thousand, six hundred five".