27904032025 has 9 divisors (see below), whose sum is σ = 34602035421. Its totient is φ = 22322557440.

The previous prime is 27904032017. The next prime is 27904032041. The reversal of 27904032025 is 52023040972.

It is a happy number.

The square root of 27904032025 is 167045.

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

It can be written as a sum of positive squares in 4 ways, for example, as 6752401929 + 21151630096 = 82173^2 + 145436^2 .

It is not a de Polignac number, because 27904032025 - 2³ = 27904032017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 818521 + ... + 851929.

Almost surely, 2^27904032025 is an apocalyptic number.

27904032025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27904032025 is the 167045-th square number.

27904032025 is the 83523-rd centered octagonal number.

It is an amenable number.

27904032025 is a deficient number, since it is larger than the sum of its proper divisors (6698003396).

27904032025 is an frugal number, since it uses more digits than its factorization.

27904032025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66828 (or 33414 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

Adding to 27904032025 its reverse (52023040972), we get a palindrome (79927072997).

The spelling of 27904032025 in words is "twenty-seven billion, nine hundred four million, thirty-two thousand, twenty-five".