8561428 has 12 divisors (see below), whose sum is σ = 15634080. Its totient is φ = 4094552.

The previous prime is 8561417. The next prime is 8561437. The reversal of 8561428 is 8241658.

It is a junction number, because it is equal to n+sod(n) for n = 8561393 and 8561402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46438 + ... + 46621.

It is an arithmetic number, because the mean of its divisors is an integer number (1302840).

Almost surely, 2^8561428 is an apocalyptic number.

It is an amenable number.

8561428 is a deficient number, since it is larger than the sum of its proper divisors (7072652).

8561428 is a wasteful number, since it uses less digits than its factorization.

8561428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93086 (or 93084 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 8561428 is about 2925.9917976645. The cubic root of 8561428 is about 204.5731988883.

The spelling of 8561428 in words is "eight million, five hundred sixty-one thousand, four hundred twenty-eight".