406849321 has 8 divisors (see below), whose sum is σ = 437844744. Its totient is φ = 376638720.

The previous prime is 406849307. The next prime is 406849327. The reversal of 406849321 is 123948604.

It can be written as a sum of positive squares in 4 ways, for example, as 48163600 + 358685721 = 6940^2 + 18939^2 .

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 406849321 - 2¹⁹ = 406325033 is a prime.

It is a super-2 number, since 2×406849321² = 331052739996322082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406849327) 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, 195130 + ... + 197203.

It is an arithmetic number, because the mean of its divisors is an integer number (54730593).

Almost surely, 2^406849321 is an apocalyptic number.

It is an amenable number.

406849321 is a deficient number, since it is larger than the sum of its proper divisors (30995423).

406849321 is a wasteful number, since it uses less digits than its factorization.

406849321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392411.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 406849321 is about 20170.5062157597. The cubic root of 406849321 is about 740.9880404300.

It can be divided in two parts, 40684 and 9321, that added together give a palindrome (50005).

The spelling of 406849321 in words is "four hundred six million, eight hundred forty-nine thousand, three hundred twenty-one".