7878423 has 8 divisors (see below), whose sum is σ = 12005248. Its totient is φ = 4501944.

The previous prime is 7878421. The next prime is 7878427. The reversal of 7878423 is 3248787.

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

It is not a de Polignac number, because 7878423 - 2¹ = 7878421 is a prime.

It is a d-powerful number, because it can be written as 7² + 8 + 7⁸ + 8⁷ + 4⁷ + 2 + 3³ .

It is a Duffinian number.

7878423 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187561 + ... + 187602.

It is an arithmetic number, because the mean of its divisors is an integer number (1500656).

Almost surely, 2^7878423 is an apocalyptic number.

7878423 is a deficient number, since it is larger than the sum of its proper divisors (4126825).

7878423 is a wasteful number, since it uses less digits than its factorization.

7878423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375173.

The product of its digits is 75264, while the sum is 39.

The square root of 7878423 is about 2806.8528639742. The cubic root of 7878423 is about 198.9816822781.

The spelling of 7878423 in words is "seven million, eight hundred seventy-eight thousand, four hundred twenty-three".