28662828601 has 9 divisors (see below), whose sum is σ = 31507470309. Its totient is φ = 26055423900.

The previous prime is 28662828569. The next prime is 28662828617. The reversal of 28662828601 is 10682826682.

It is a happy number.

The square root of 28662828601 is 169301.

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

It is not a de Polignac number, because 28662828601 - 2⁵ = 28662828569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28662828101) 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, 1854616 + ... + 1870006.

Almost surely, 2^28662828601 is an apocalyptic number.

28662828601 is the 169301-st square number.

28662828601 is the 84651-st centered octagonal number.

It is an amenable number.

28662828601 is a deficient number, since it is larger than the sum of its proper divisors (2844641708).

28662828601 is an frugal number, since it uses more digits than its factorization.

28662828601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30804 (or 15402 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 49.

Multiplying 28662828601 by its sum of digits (49), we get a square (1404478601449 = 1185107²).

The spelling of 28662828601 in words is "twenty-eight billion, six hundred sixty-two million, eight hundred twenty-eight thousand, six hundred one".