428115 has 8 divisors (see below), whose sum is σ = 685008. Its totient is φ = 228320.

The previous prime is 428093. The next prime is 428137. The reversal of 428115 is 511824.

It is an interprime number because it is at equal distance from previous prime (428093) and next prime (428137).

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

It is not a de Polignac number, because 428115 - 2⁵ = 428083 is a prime.

428115 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 428091 and 428100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14256 + ... + 14285.

It is an arithmetic number, because the mean of its divisors is an integer number (85626).

2⁴²⁸¹¹⁵ is an apocalyptic number.

428115 is a deficient number, since it is larger than the sum of its proper divisors (256893).

428115 is a wasteful number, since it uses less digits than its factorization.

428115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28549.

The product of its digits is 320, while the sum is 21.

The square root of 428115 is about 654.3049747633. The cubic root of 428115 is about 75.3679694715.

Adding to 428115 its reverse (511824), we get a palindrome (939939).

The spelling of 428115 in words is "four hundred twenty-eight thousand, one hundred fifteen".