8531428 has 6 divisors (see below), whose sum is σ = 14930006. Its totient is φ = 4265712.

The previous prime is 8531407. The next prime is 8531429. The reversal of 8531428 is 8241358.

It can be written as a sum of positive squares in only one way, i.e., 7795264 + 736164 = 2792^2 + 858^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8531428.

It is not an unprimeable number, because it can be changed into a prime (8531429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1066425 + ... + 1066432.

Almost surely, 2^8531428 is an apocalyptic number.

It is an amenable number.

8531428 is a deficient number, since it is larger than the sum of its proper divisors (6398578).

8531428 is a wasteful number, since it uses less digits than its factorization.

8531428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132861 (or 2132859 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 8531428 is about 2920.8608320151. The cubic root of 8531428 is about 204.3339717259. Note that the first 3 decimals are identical.

It can be divided in two parts, 85 and 31428, that added together give a palindrome (31513).

The spelling of 8531428 in words is "eight million, five hundred thirty-one thousand, four hundred twenty-eight".