825630449 has 24 divisors (see below), whose sum is σ = 1036165608. Its totient is φ = 653452800.

The previous prime is 825630439. The next prime is 825630457. The reversal of 825630449 is 944036528.

It can be written as a sum of positive squares in 4 ways, for example, as 173185600 + 652444849 = 13160^2 + 25543^2 .

It is not a de Polignac number, because 825630449 - 2⁸ = 825630193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825630439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34799 + ... + 53499.

It is an arithmetic number, because the mean of its divisors is an integer number (43173567).

Almost surely, 2^825630449 is an apocalyptic number.

It is an amenable number.

825630449 is a deficient number, since it is larger than the sum of its proper divisors (210535159).

825630449 is a wasteful number, since it uses less digits than its factorization.

825630449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18785 (or 18778 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 825630449 is about 28733.7858452380. The cubic root of 825630449 is about 938.1275723124.

The spelling of 825630449 in words is "eight hundred twenty-five million, six hundred thirty thousand, four hundred forty-nine".