28901700025 has 45 divisors (see below), whose sum is σ = 39562463965. Its totient is φ = 20944616000.

The previous prime is 28901700011. The next prime is 28901700029. The reversal of 28901700025 is 52000710982.

The square root of 28901700025 is 170005.

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 41126569 + 28860573456 = 6413^2 + 169884^2 .

It is not a de Polignac number, because 28901700025 - 2²³ = 28893311417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28901700029) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 102852885 + ... + 102853165.

Almost surely, 2^28901700025 is an apocalyptic number.

28901700025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28901700025 is the 170005-th square number.

28901700025 is the 85003-rd centered octagonal number.

It is an amenable number.

28901700025 is a deficient number, since it is larger than the sum of its proper divisors (10660763940).

28901700025 is an frugal number, since it uses more digits than its factorization.

28901700025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 28901700025 in words is "twenty-eight billion, nine hundred one million, seven hundred thousand, twenty-five".