28847641 has 9 divisors (see below), whose sum is σ = 29795839. Its totient is φ = 27929200.

The previous prime is 28847627. The next prime is 28847677. The reversal of 28847641 is 14674882.

The square root of 28847641 is 5371.

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., 1390041 + 27457600 = 1179^2 + 5240^2 .

It is not a de Polignac number, because 28847641 - 2¹⁹ = 28323353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28847594 and 28847603.

It is not an unprimeable number, because it can be changed into a prime (28847041) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 220146 + ... + 220276.

Almost surely, 2^28847641 is an apocalyptic number.

28847641 is the 5371-st square number.

28847641 is the 2686-th centered octagonal number.

It is an amenable number.

28847641 is a deficient number, since it is larger than the sum of its proper divisors (948198).

28847641 is an frugal number, since it uses more digits than its factorization.

28847641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 172 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The cubic root of 28847641 is about 306.6926971970.

The spelling of 28847641 in words is "twenty-eight million, eight hundred forty-seven thousand, six hundred forty-one".