428103899 has 4 divisors (see below), whose sum is σ = 446717136. Its totient is φ = 409490664.

The previous prime is 428103889. The next prime is 428103959. The reversal of 428103899 is 998301824.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428103899 - 2⁴ = 428103883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428103859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9306584 + ... + 9306629.

It is an arithmetic number, because the mean of its divisors is an integer number (111679284).

Almost surely, 2^428103899 is an apocalyptic number.

428103899 is a deficient number, since it is larger than the sum of its proper divisors (18613237).

428103899 is a wasteful number, since it uses less digits than its factorization.

428103899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18613236.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 428103899 is about 20690.6717870639. The cubic root of 428103899 is about 753.6731803668.

The spelling of 428103899 in words is "four hundred twenty-eight million, one hundred three thousand, eight hundred ninety-nine".