825657822 has 48 divisors (see below), whose sum is σ = 1957249008. Its totient is φ = 249469440.

The previous prime is 825657809. The next prime is 825657839. The reversal of 825657822 is 228756528.

825657822 is a `hidden beast` number, since 8 + 2 + 56 + 578 + 22 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63988 + ... + 75800.

It is an arithmetic number, because the mean of its divisors is an integer number (40776021).

Almost surely, 2^825657822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 825657822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (978624504).

825657822 is an abundant number, since it is smaller than the sum of its proper divisors (1131591186).

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

825657822 is a wasteful number, since it uses less digits than its factorization.

825657822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12185 (or 12182 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 825657822 is about 28734.2621620949. The cubic root of 825657822 is about 938.1379397766.

The spelling of 825657822 in words is "eight hundred twenty-five million, six hundred fifty-seven thousand, eight hundred twenty-two".