787828 has 12 divisors (see below), whose sum is σ = 1394820. Its totient is φ = 389312.

The previous prime is 787823. The next prime is 787837. The reversal of 787828 is 828787.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 252004 = 732^2 + 502^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787823) by changing a digit.

787828 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751 + ... + 1462.

It is an arithmetic number, because the mean of its divisors is an integer number (116235).

2⁷⁸⁷⁸²⁸ is an apocalyptic number.

It is an amenable number.

787828 is a deficient number, since it is larger than the sum of its proper divisors (606992).

787828 is a wasteful number, since it uses less digits than its factorization.

787828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306 (or 2304 counting only the distinct ones).

The product of its digits is 50176, while the sum is 40.

The square root of 787828 is about 887.5967552892. The cubic root of 787828 is about 92.3585566537.

The spelling of 787828 in words is "seven hundred eighty-seven thousand, eight hundred twenty-eight".