785228647 has 4 divisors (see below), whose sum is σ = 897404176. Its totient is φ = 673053120.

The previous prime is 785228629. The next prime is 785228663. The reversal of 785228647 is 746822587.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 785228647 - 2⁷ = 785228519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 785228647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (785228627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56087754 + ... + 56087767.

It is an arithmetic number, because the mean of its divisors is an integer number (224351044).

Almost surely, 2^785228647 is an apocalyptic number.

785228647 is a deficient number, since it is larger than the sum of its proper divisors (112175529).

785228647 is a wasteful number, since it uses less digits than its factorization.

785228647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112175528.

The product of its digits is 1505280, while the sum is 49.

The square root of 785228647 is about 28021.9315358524. The cubic root of 785228647 is about 922.5686905713.

The spelling of 785228647 in words is "seven hundred eighty-five million, two hundred twenty-eight thousand, six hundred forty-seven".