825226440 has 64 divisors (see below), whose sum is σ = 2477606400. Its totient is φ = 219889152.

The previous prime is 825226403. The next prime is 825226463. The reversal of 825226440 is 44622528.

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, 255556 + ... + 258764.

It is an arithmetic number, because the mean of its divisors is an integer number (38712600).

Almost surely, 2^825226440 is an apocalyptic number.

It is an amenable number.

825226440 is an abundant number, since it is smaller than the sum of its proper divisors (1652379960).

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

825226440 is a wasteful number, since it uses less digits than its factorization.

825226440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5366 (or 5362 counting only the distinct ones).

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

The square root of 825226440 is about 28726.7547766886. The cubic root of 825226440 is about 937.9745281263.

Adding to 825226440 its reverse (44622528), we get a palindrome (869848968).

The spelling of 825226440 in words is "eight hundred twenty-five million, two hundred twenty-six thousand, four hundred forty".