28297176001081 has 27 divisors (see below), whose sum is σ = 32033275730127. Its totient is φ = 24983393189040.

The previous prime is 28297176001079. The next prime is 28297176001093. The reversal of 28297176001081 is 18010067179282.

The square root of 28297176001081 is 5319509.

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., 4185972781225 + 24111203219856 = 2045965^2 + 4910316^2 .

It is not a de Polignac number, because 28297176001081 - 2¹ = 28297176001079 is a prime.

It is a super-2 number, since 2×28297176001081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28297176001051) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1590524296 + ... + 1590542086.

Almost surely, 2^{28297176001081} is an apocalyptic number.

28297176001081 is the 5319509-th square number.

28297176001081 is the 2659755-th centered octagonal number.

It is an amenable number.

28297176001081 is a deficient number, since it is larger than the sum of its proper divisors (3736099729046).

28297176001081 is an frugal number, since it uses more digits than its factorization.

28297176001081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35654 (or 17827 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 52.

The spelling of 28297176001081 in words is "twenty-eight trillion, two hundred ninety-seven billion, one hundred seventy-six million, one thousand, eighty-one".