820724835 has 16 divisors (see below), whose sum is σ = 1500754176. Its totient is φ = 375188448.

The previous prime is 820724819. The next prime is 820724843. The reversal of 820724835 is 538427028.

It is not a de Polignac number, because 820724835 - 2⁴ = 820724819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 820724793 and 820724802.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3908109 + ... + 3908318.

It is an arithmetic number, because the mean of its divisors is an integer number (93797136).

Almost surely, 2^820724835 is an apocalyptic number.

820724835 is a deficient number, since it is larger than the sum of its proper divisors (680029341).

820724835 is a wasteful number, since it uses less digits than its factorization.

820724835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7816442.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 820724835 is about 28648.2954990345. The cubic root of 820724835 is about 936.2658690729.

The spelling of 820724835 in words is "eight hundred twenty million, seven hundred twenty-four thousand, eight hundred thirty-five".