820356386 has 8 divisors (see below), whose sum is σ = 1302919020. Its totient is φ = 386050048.

The previous prime is 820356371. The next prime is 820356401. The reversal of 820356386 is 683653028.

It is an interprime number because it is at equal distance from previous prime (820356371) and next prime (820356401).

It can be written as a sum of positive squares in 2 ways, for example, as 798910225 + 21446161 = 28265^2 + 4631^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12064031 + ... + 12064098.

Almost surely, 2^820356386 is an apocalyptic number.

820356386 is a deficient number, since it is larger than the sum of its proper divisors (482562634).

820356386 is a wasteful number, since it uses less digits than its factorization.

820356386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24128148.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 820356386 is about 28641.8642200538. The cubic root of 820356386 is about 936.1257417759.

The spelling of 820356386 in words is "eight hundred twenty million, three hundred fifty-six thousand, three hundred eighty-six".