787628785 has 8 divisors (see below), whose sum is σ = 1000751976. Its totient is φ = 593038080.

The previous prime is 787628761. The next prime is 787628789. The reversal of 787628785 is 587826787.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 328298161 + 459330624 = 18119^2 + 21432^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 787628785 - 2⁵ = 787628753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787628789) 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, 4633026 + ... + 4633195.

It is an arithmetic number, because the mean of its divisors is an integer number (125093997).

Almost surely, 2^787628785 is an apocalyptic number.

It is an amenable number.

787628785 is a deficient number, since it is larger than the sum of its proper divisors (213123191).

787628785 is a wasteful number, since it uses less digits than its factorization.

787628785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9266243.

The product of its digits is 10536960, while the sum is 58.

The square root of 787628785 is about 28064.7249229348. The cubic root of 787628785 is about 923.5077121448.

The spelling of 787628785 in words is "seven hundred eighty-seven million, six hundred twenty-eight thousand, seven hundred eighty-five".