402342305 has 8 divisors (see below), whose sum is σ = 483323112. Its totient is φ = 321532288.

The previous prime is 402342293. The next prime is 402342319. The reversal of 402342305 is 503243204.

It can be written as a sum of positive squares in 4 ways, for example, as 65399569 + 336942736 = 8087^2 + 18356^2 .

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 402342305 - 2⁸ = 402342049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37454 + ... + 46983.

It is an arithmetic number, because the mean of its divisors is an integer number (60415389).

Almost surely, 2^402342305 is an apocalyptic number.

It is an amenable number.

402342305 is a deficient number, since it is larger than the sum of its proper divisors (80980807).

402342305 is an equidigital number, since it uses as much as digits as its factorization.

402342305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85395.

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

The square root of 402342305 is about 20058.4721501913. The cubic root of 402342305 is about 738.2416891634.

Adding to 402342305 its reverse (503243204), we get a palindrome (905585509).

The spelling of 402342305 in words is "four hundred two million, three hundred forty-two thousand, three hundred five".