825403984 has 10 divisors (see below), whose sum is σ = 1599220250. Its totient is φ = 412701984.

The previous prime is 825403979. The next prime is 825403991. The reversal of 825403984 is 489304528.

It can be written as a sum of positive squares in only one way, i.e., 476461584 + 348942400 = 21828^2 + 18680^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 825403984.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25793859 + ... + 25793890.

It is an arithmetic number, because the mean of its divisors is an integer number (159922025).

Almost surely, 2^825403984 is an apocalyptic number.

It is an amenable number.

825403984 is a deficient number, since it is larger than the sum of its proper divisors (773816266).

825403984 is a wasteful number, since it uses less digits than its factorization.

825403984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51587757 (or 51587751 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 825403984 is about 28729.8448307679. The cubic root of 825403984 is about 938.0417903952.

The spelling of 825403984 in words is "eight hundred twenty-five million, four hundred three thousand, nine hundred eighty-four".