825221748 has 24 divisors (see below), whose sum is σ = 2073634528. Its totient is φ = 253914336.

The previous prime is 825221689. The next prime is 825221753. The reversal of 825221748 is 847122528.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2644786 + ... + 2645097.

Almost surely, 2^825221748 is an apocalyptic number.

It is an amenable number.

825221748 is an abundant number, since it is smaller than the sum of its proper divisors (1248412780).

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

825221748 is a wasteful number, since it uses less digits than its factorization.

825221748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289903 (or 5289901 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 825221748 is about 28726.6731105431. The cubic root of 825221748 is about 937.9727504385.

The spelling of 825221748 in words is "eight hundred twenty-five million, two hundred twenty-one thousand, seven hundred forty-eight".