678424433 has 8 divisors (see below), whose sum is σ = 692032896. Its totient is φ = 664846000.

The previous prime is 678424391. The next prime is 678424447. The reversal of 678424433 is 334424876.

It is a happy number.

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 678424433 - 2¹⁶ = 678358897 is a prime.

It is a super-2 number, since 2×678424433² = 920519422582742978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678424133) 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 7 ways as a sum of consecutive naturals, for example, 41258 + ... + 55308.

It is an arithmetic number, because the mean of its divisors is an integer number (86504112).

Almost surely, 2^678424433 is an apocalyptic number.

It is an amenable number.

678424433 is a deficient number, since it is larger than the sum of its proper divisors (13608463).

678424433 is a wasteful number, since it uses less digits than its factorization.

678424433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15015.

The product of its digits is 387072, while the sum is 41.

The square root of 678424433 is about 26046.5819830549. The cubic root of 678424433 is about 878.6862425692.

The spelling of 678424433 in words is "six hundred seventy-eight million, four hundred twenty-four thousand, four hundred thirty-three".