785197820 has 96 divisors (see below), whose sum is σ = 1834721280. Its totient is φ = 279901440.

The previous prime is 785197817. The next prime is 785197859. The reversal of 785197820 is 28791587.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4386491 + ... + 4386669.

It is an arithmetic number, because the mean of its divisors is an integer number (19111680).

Almost surely, 2^785197820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 785197820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (917360640).

785197820 is an abundant number, since it is smaller than the sum of its proper divisors (1049523460).

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

785197820 is a wasteful number, since it uses less digits than its factorization.

785197820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 47.

The square root of 785197820 is about 28021.3814791491. The cubic root of 785197820 is about 922.5566174861.

The spelling of 785197820 in words is "seven hundred eighty-five million, one hundred ninety-seven thousand, eight hundred twenty".