8240428 has 18 divisors (see below), whose sum is σ = 16775556. Its totient is φ = 3531528.

The previous prime is 8240399. The next prime is 8240431.

8240428 is nontrivially palindromic in base 10.

8240428 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 8240396 and 8240405.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20826 + ... + 21217.

Almost surely, 2^8240428 is an apocalyptic number.

It is an amenable number.

8240428 is an abundant number, since it is smaller than the sum of its proper divisors (8535128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8240428 is a wasteful number, since it uses less digits than its factorization.

8240428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42061 (or 42052 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 8240428 is about 2870.6145683459. The cubic root of 8240428 is about 201.9838238198.

It can be divided in two parts, 8240 and 428, that added together give a palindrome (8668).

The spelling of 8240428 in words is "eight million, two hundred forty thousand, four hundred twenty-eight".