828696978 has 24 divisors (see below), whose sum is σ = 1815687900. Its totient is φ = 273128064.

The previous prime is 828696959. The next prime is 828697003. The reversal of 828696978 is 879696828.

It can be written as a sum of positive squares in 2 ways, for example, as 608263569 + 220433409 = 24663^2 + 14847^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257043 + ... + 260246.

Almost surely, 2^828696978 is an apocalyptic number.

828696978 is an abundant number, since it is smaller than the sum of its proper divisors (986990922).

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

828696978 is a wasteful number, since it uses less digits than its factorization.

828696978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517386 (or 517383 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The square root of 828696978 is about 28787.0974222828. The cubic root of 828696978 is about 939.2875913452.

The spelling of 828696978 in words is "eight hundred twenty-eight million, six hundred ninety-six thousand, nine hundred seventy-eight".