428698279 has 4 divisors (see below), whose sum is σ = 432073984. Its totient is φ = 425322576.

The previous prime is 428698253. The next prime is 428698289. The reversal of 428698279 is 972896824.

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 428698279 - 2⁹ = 428697767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428698229) 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, 1687662 + ... + 1687915.

It is an arithmetic number, because the mean of its divisors is an integer number (108018496).

Almost surely, 2^428698279 is an apocalyptic number.

428698279 is a deficient number, since it is larger than the sum of its proper divisors (3375705).

428698279 is a wasteful number, since it uses less digits than its factorization.

428698279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375704.

The product of its digits is 3483648, while the sum is 55.

The square root of 428698279 is about 20705.0302825183. The cubic root of 428698279 is about 754.0218193350.

The spelling of 428698279 in words is "four hundred twenty-eight million, six hundred ninety-eight thousand, two hundred seventy-nine".