782663828 has 12 divisors (see below), whose sum is σ = 1370378100. Its totient is φ = 391127232.

The previous prime is 782663809. The next prime is 782663837. The reversal of 782663828 is 828366287.

It can be written as a sum of positive squares in 2 ways, for example, as 513113104 + 269550724 = 22652^2 + 16418^2 .

It is a super-2 number, since 2×782663828² = 1225125335319227168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42401 + ... + 57992.

It is an arithmetic number, because the mean of its divisors is an integer number (114198175).

Almost surely, 2^782663828 is an apocalyptic number.

It is an amenable number.

782663828 is a deficient number, since it is larger than the sum of its proper divisors (587714272).

782663828 is a wasteful number, since it uses less digits than its factorization.

782663828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102346 (or 102344 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The square root of 782663828 is about 27976.1296107950. The cubic root of 782663828 is about 921.5631224519.

The spelling of 782663828 in words is "seven hundred eighty-two million, six hundred sixty-three thousand, eight hundred twenty-eight".