8500428 has 36 divisors (see below), whose sum is σ = 21577920. Its totient is φ = 2821536.

The previous prime is 8500421. The next prime is 8500433. The reversal of 8500428 is 8240058.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (8500421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13701 + ... + 14307.

Almost surely, 2^8500428 is an apocalyptic number.

It is an amenable number.

8500428 is an abundant number, since it is smaller than the sum of its proper divisors (13077492).

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

8500428 is a wasteful number, since it uses less digits than its factorization.

8500428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 8500428 is about 2915.5493478931. The cubic root of 8500428 is about 204.0861804274.

The spelling of 8500428 in words is "eight million, five hundred thousand, four hundred twenty-eight".