28198469776 has 15 divisors (see below), whose sum is σ = 54635836633. Its totient is φ = 14098899040.

The previous prime is 28198469701. The next prime is 28198469777. The reversal of 28198469776 is 67796489182.

The square root of 28198469776 is 167924.

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., 589324176 + 27609145600 = 24276^2 + 166160^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28198469777) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 650706 + ... + 692686.

Almost surely, 2^28198469776 is an apocalyptic number.

28198469776 is the 167924-th square number.

It is an amenable number.

28198469776 is a deficient number, since it is larger than the sum of its proper divisors (26437366857).

28198469776 is an frugal number, since it uses more digits than its factorization.

28198469776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83970 (or 41983 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 67.

The spelling of 28198469776 in words is "twenty-eight billion, one hundred ninety-eight million, four hundred sixty-nine thousand, seven hundred seventy-six".