825857290 has 8 divisors (see below), whose sum is σ = 1486543140. Its totient is φ = 330342912.

The previous prime is 825857243. The next prime is 825857309. The reversal of 825857290 is 92758528.

It can be written as a sum of positive squares in 2 ways, for example, as 767899521 + 57957769 = 27711^2 + 7613^2 .

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

It is a super-2 number, since 2×825857290² = 1364080526892288200, 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 825857290.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41292855 + ... + 41292874.

Almost surely, 2^825857290 is an apocalyptic number.

825857290 is a deficient number, since it is larger than the sum of its proper divisors (660685850).

825857290 is a wasteful number, since it uses less digits than its factorization.

825857290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82585736.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 825857290 is about 28737.7328611705. The cubic root of 825857290 is about 938.2134809295.

The spelling of 825857290 in words is "eight hundred twenty-five million, eight hundred fifty-seven thousand, two hundred ninety".