405402323 has 4 divisors (see below), whose sum is σ = 414830328. Its totient is φ = 395974320.

The previous prime is 405402313. The next prime is 405402341. The reversal of 405402323 is 323204504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 405402323 - 2²² = 401208019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405402313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4713938 + ... + 4714023.

It is an arithmetic number, because the mean of its divisors is an integer number (103707582).

Almost surely, 2^405402323 is an apocalyptic number.

405402323 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

405402323 is a deficient number, since it is larger than the sum of its proper divisors (9428005).

405402323 is an equidigital number, since it uses as much as digits as its factorization.

405402323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9428004.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 405402323 is about 20134.6051115983. The cubic root of 405402323 is about 740.1085322917.

Adding to 405402323 its reverse (323204504), we get a palindrome (728606827).

The spelling of 405402323 in words is "four hundred five million, four hundred two thousand, three hundred twenty-three".