405442313 has 8 divisors (see below), whose sum is σ = 416236128. Its totient is φ = 394710624.

The previous prime is 405442309. The next prime is 405442319. The reversal of 405442313 is 313244504.

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 405442313 - 2² = 405442309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405442319) 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, 2156 + ... + 28557.

It is an arithmetic number, because the mean of its divisors is an integer number (52029516).

Almost surely, 2^405442313 is an apocalyptic number.

405442313 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

405442313 is a deficient number, since it is larger than the sum of its proper divisors (10793815).

405442313 is a wasteful number, since it uses less digits than its factorization.

405442313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31063.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 405442313 is about 20135.5981535191. The cubic root of 405442313 is about 740.1328669385.

Adding to 405442313 its reverse (313244504), we get a palindrome (718686817).

The spelling of 405442313 in words is "four hundred five million, four hundred forty-two thousand, three hundred thirteen".