28323207025 has 27 divisors (see below), whose sum is σ = 35589140769. Its totient is φ = 22360346880.

The previous prime is 28323207013. The next prime is 28323207041. The reversal of 28323207025 is 52070232382.

The square root of 28323207025 is 168295.

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 1041417441 + 27281789584 = 32271^2 + 165172^2 .

It is not a de Polignac number, because 28323207025 - 2³¹ = 26175723377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 81622902 + ... + 81623248.

Almost surely, 2^28323207025 is an apocalyptic number.

28323207025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28323207025 is the 168295-th square number.

28323207025 is the 84148-th centered octagonal number.

It is an amenable number.

28323207025 is a deficient number, since it is larger than the sum of its proper divisors (7265933744).

28323207025 is an frugal number, since it uses more digits than its factorization.

28323207025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The spelling of 28323207025 in words is "twenty-eight billion, three hundred twenty-three million, two hundred seven thousand, twenty-five".