423378506 has 8 divisors (see below), whose sum is σ = 672424740. Its totient is φ = 199236928.

The previous prime is 423378493. The next prime is 423378521. The reversal of 423378506 is 605873324.

It can be written as a sum of positive squares in 2 ways, for example, as 412455481 + 10923025 = 20309^2 + 3305^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 423378506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6226121 + ... + 6226188.

Almost surely, 2^423378506 is an apocalyptic number.

423378506 is a deficient number, since it is larger than the sum of its proper divisors (249046234).

423378506 is a wasteful number, since it uses less digits than its factorization.

423378506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12452328.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 423378506 is about 20576.1635393967. The cubic root of 423378506 is about 750.8899101807.

The spelling of 423378506 in words is "four hundred twenty-three million, three hundred seventy-eight thousand, five hundred six".