820266842 has 8 divisors (see below), whose sum is σ = 1256579136. Its totient is φ = 401407132.

The previous prime is 820266833. The next prime is 820266859. The reversal of 820266842 is 248662028.

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

It is a junction number, because it is equal to n+sod(n) for n = 820266796 and 820266805.

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, 4363028 + ... + 4363215.

It is an arithmetic number, because the mean of its divisors is an integer number (157072392).

Almost surely, 2^820266842 is an apocalyptic number.

820266842 is a deficient number, since it is larger than the sum of its proper divisors (436312294).

820266842 is a wasteful number, since it uses less digits than its factorization.

820266842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8726292.

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 820266842 is about 28640.3010109880. The cubic root of 820266842 is about 936.0916803627.

The spelling of 820266842 in words is "eight hundred twenty million, two hundred sixty-six thousand, eight hundred forty-two".