28621195684 has 9 divisors (see below), whose sum is σ = 50087684577. Its totient is φ = 14310428664.

The previous prime is 28621195679. The next prime is 28621195739. The reversal of 28621195684 is 48659112682.

The square root of 28621195684 is 169178.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 24249341284 + 4371854400 = 155722^2 + 66120^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 296062 + ... + 380650.

Almost surely, 2^28621195684 is an apocalyptic number.

28621195684 is the 169178-th square number.

It is an amenable number.

28621195684 is a deficient number, since it is larger than the sum of its proper divisors (21466488893).

28621195684 is an frugal number, since it uses more digits than its factorization.

28621195684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169182 (or 84591 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 52.

The spelling of 28621195684 in words is "twenty-eight billion, six hundred twenty-one million, one hundred ninety-five thousand, six hundred eighty-four".