8415428 has 24 divisors (see below), whose sum is σ = 17287872. Its totient is φ = 3508704.

The previous prime is 8415427. The next prime is 8415431. The reversal of 8415428 is 8245148.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 8415394 and 8415403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8415427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3026 + ... + 5097.

It is an arithmetic number, because the mean of its divisors is an integer number (720328).

Almost surely, 2^8415428 is an apocalyptic number.

It is an amenable number.

8415428 is an abundant number, since it is smaller than the sum of its proper divisors (8872444).

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

8415428 is a wasteful number, since it uses less digits than its factorization.

8415428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8171 (or 8169 counting only the distinct ones).

The product of its digits is 10240, while the sum is 32.

The square root of 8415428 is about 2900.9357111112. The cubic root of 8415428 is about 203.4036473355.

The spelling of 8415428 in words is "eight million, four hundred fifteen thousand, four hundred twenty-eight".