8457428 has 24 divisors (see below), whose sum is σ = 17001600. Its totient is φ = 3606048.

The previous prime is 8457401. The next prime is 8457443. The reversal of 8457428 is 8247548.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 8457391 and 8457400.

It is a congruent number.

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, 5753 + ... + 7071.

It is an arithmetic number, because the mean of its divisors is an integer number (708400).

Almost surely, 2^8457428 is an apocalyptic number.

It is an amenable number.

8457428 is an abundant number, since it is smaller than the sum of its proper divisors (8544172).

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

8457428 is a wasteful number, since it uses less digits than its factorization.

8457428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559 (or 1557 counting only the distinct ones).

The product of its digits is 71680, while the sum is 38.

The square root of 8457428 is about 2908.1657449327. The cubic root of 8457428 is about 203.7414705301.

The spelling of 8457428 in words is "eight million, four hundred fifty-seven thousand, four hundred twenty-eight".