428108923 has 8 divisors (see below), whose sum is σ = 467323200. Its totient is φ = 388943880.

The previous prime is 428108911. The next prime is 428108929. The reversal of 428108923 is 329801824.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428108923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428108929) 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, 7236 + ... + 30142.

It is an arithmetic number, because the mean of its divisors is an integer number (58415400).

Almost surely, 2^428108923 is an apocalyptic number.

428108923 is a deficient number, since it is larger than the sum of its proper divisors (39214277).

428108923 is a wasteful number, since it uses less digits than its factorization.

428108923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24617.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 428108923 is about 20690.7931940755. The cubic root of 428108923 is about 753.6761285913.

The spelling of 428108923 in words is "four hundred twenty-eight million, one hundred eight thousand, nine hundred twenty-three".