825404406 has 8 divisors (see below), whose sum is σ = 1650808824. Its totient is φ = 275134800.

The previous prime is 825404341. The next prime is 825404413. The reversal of 825404406 is 604404528.

It is a sphenic number, since it is the product of 3 distinct primes.

825404406 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68783695 + ... + 68783706.

It is an arithmetic number, because the mean of its divisors is an integer number (206351103).

Almost surely, 2^825404406 is an apocalyptic number.

825404406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

825404406 is a wasteful number, since it uses less digits than its factorization.

825404406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137567406.

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 825404406 is about 28729.8521750461. The cubic root of 825404406 is about 938.0419502578.

The spelling of 825404406 in words is "eight hundred twenty-five million, four hundred four thousand, four hundred six".