825290439 has 64 divisors (see below), whose sum is σ = 1244989440. Its totient is φ = 484323840.

The previous prime is 825290371. The next prime is 825290447. The reversal of 825290439 is 934092528.

It is not a de Polignac number, because 825290439 - 2¹¹ = 825288391 is a prime.

It is a super-2 number, since 2×825290439² = 1362208617409625442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 825290439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825292439) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5256549 + ... + 5256705.

It is an arithmetic number, because the mean of its divisors is an integer number (19452960).

Almost surely, 2^825290439 is an apocalyptic number.

825290439 is a deficient number, since it is larger than the sum of its proper divisors (419699001).

825290439 is a wasteful number, since it uses less digits than its factorization.

825290439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 825290439 is about 28727.8686818218. The cubic root of 825290439 is about 937.9987751601.

The spelling of 825290439 in words is "eight hundred twenty-five million, two hundred ninety thousand, four hundred thirty-nine".