428657678 has 8 divisors (see below), whose sum is σ = 643425120. Its totient is φ = 214182640.

The previous prime is 428657659. The next prime is 428657699. The reversal of 428657678 is 876756824.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 69398 + ... + 75321.

It is an arithmetic number, because the mean of its divisors is an integer number (80428140).

Almost surely, 2^428657678 is an apocalyptic number.

428657678 is a deficient number, since it is larger than the sum of its proper divisors (214767442).

428657678 is a wasteful number, since it uses less digits than its factorization.

428657678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146202.

The product of its digits is 4515840, while the sum is 53.

The square root of 428657678 is about 20704.0497970808. The cubic root of 428657678 is about 753.9980147091.

The spelling of 428657678 in words is "four hundred twenty-eight million, six hundred fifty-seven thousand, six hundred seventy-eight".