428699 has 4 divisors (see below), whose sum is σ = 442560. Its totient is φ = 414840.

The previous prime is 428693. The next prime is 428731. The reversal of 428699 is 996824.

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 428699 - 2⁴ = 428683 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428699.

It is not an unprimeable number, because it can be changed into a prime (428693) 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, 6884 + ... + 6945.

It is an arithmetic number, because the mean of its divisors is an integer number (110640).

2⁴²⁸⁶⁹⁹ is an apocalyptic number.

428699 is a deficient number, since it is larger than the sum of its proper divisors (13861).

428699 is a wasteful number, since it uses less digits than its factorization.

428699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13860.

The product of its digits is 31104, while the sum is 38.

The square root of 428699 is about 654.7510977463. The cubic root of 428699 is about 75.4022242048.

The spelling of 428699 in words is "four hundred twenty-eight thousand, six hundred ninety-nine".