825709388 has 48 divisors (see below), whose sum is σ = 1701772800. Its totient is φ = 350379792.

The previous prime is 825709331. The next prime is 825709421. The reversal of 825709388 is 883907528.

825709388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138395 + ... + 144237.

It is an arithmetic number, because the mean of its divisors is an integer number (35453600).

Almost surely, 2^825709388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 825709388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850886400).

825709388 is an abundant number, since it is smaller than the sum of its proper divisors (876063412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825709388 is a wasteful number, since it uses less digits than its factorization.

825709388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5971 (or 5955 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The square root of 825709388 is about 28735.1594392653. The cubic root of 825709388 is about 938.1574696644.

The spelling of 825709388 in words is "eight hundred twenty-five million, seven hundred nine thousand, three hundred eighty-eight".