405402423 has 8 divisors (see below), whose sum is σ = 540855408. Its totient is φ = 270108864.

The previous prime is 405402421. The next prime is 405402427. The reversal of 405402423 is 324204504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 405402423 - 2¹ = 405402421 is a prime.

It is a super-2 number, since 2×405402423² = 328702249148541858, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405402393 and 405402402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405402421) 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, 33790 + ... + 44187.

It is an arithmetic number, because the mean of its divisors is an integer number (67606926).

Almost surely, 2^405402423 is an apocalyptic number.

405402423 is a deficient number, since it is larger than the sum of its proper divisors (135452985).

405402423 is a wasteful number, since it uses less digits than its factorization.

405402423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79713.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 405402423 is about 20134.6075948850. The cubic root of 405402423 is about 740.1085931455.

Adding to 405402423 its reverse (324204504), we get a palindrome (729606927).

The spelling of 405402423 in words is "four hundred five million, four hundred two thousand, four hundred twenty-three".