406320340 has 12 divisors (see below), whose sum is σ = 853272756. Its totient is φ = 162528128.

The previous prime is 406320331. The next prime is 406320359. The reversal of 406320340 is 43023604.

It can be written as a sum of positive squares in 2 ways, for example, as 195664144 + 210656196 = 13988^2 + 14514^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10157989 + ... + 10158028.

It is an arithmetic number, because the mean of its divisors is an integer number (71106063).

Almost surely, 2^406320340 is an apocalyptic number.

It is an amenable number.

406320340 is an abundant number, since it is smaller than the sum of its proper divisors (446952416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406320340 is a wasteful number, since it uses less digits than its factorization.

406320340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20316026 (or 20316024 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 406320340 is about 20157.3892158682. The cubic root of 406320340 is about 740.6667596553. Note that the first 3 decimals are identical.

Adding to 406320340 its reverse (43023604), we get a palindrome (449343944).

The spelling of 406320340 in words is "four hundred six million, three hundred twenty thousand, three hundred forty".