402305623 has 4 divisors (see below), whose sum is σ = 404528488. Its totient is φ = 400082760.

The previous prime is 402305621. The next prime is 402305633. The reversal of 402305623 is 326503204.

It is a happy number.

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 402305623 - 2¹ = 402305621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402305621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111161 + ... + 1111522.

It is an arithmetic number, because the mean of its divisors is an integer number (101132122).

Almost surely, 2^402305623 is an apocalyptic number.

402305623 is a deficient number, since it is larger than the sum of its proper divisors (2222865).

402305623 is a wasteful number, since it uses less digits than its factorization.

402305623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222864.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 402305623 is about 20057.5577526278. The cubic root of 402305623 is about 738.2192530401.

Adding to 402305623 its reverse (326503204), we get a palindrome (728808827).

The spelling of 402305623 in words is "four hundred two million, three hundred five thousand, six hundred twenty-three".