785422720 has 64 divisors (see below), whose sum is σ = 1881043200. Its totient is φ = 313602048.

The previous prime is 785422667. The next prime is 785422723. The reversal of 785422720 is 27224587.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 785422720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (785422723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695116 + ... + 696244.

It is an arithmetic number, because the mean of its divisors is an integer number (29391300).

Almost surely, 2^785422720 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 785422720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940521600).

785422720 is an abundant number, since it is smaller than the sum of its proper divisors (1095620480).

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

785422720 is a wasteful number, since it uses less digits than its factorization.

785422720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235 (or 2223 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 785422720 is about 28025.3941988333. The cubic root of 785422720 is about 922.6446900591.

The spelling of 785422720 in words is "seven hundred eighty-five million, four hundred twenty-two thousand, seven hundred twenty".