820477366 has 8 divisors (see below), whose sum is σ = 1240111224. Its totient is φ = 407106960.

The previous prime is 820477351. The next prime is 820477369. The reversal of 820477366 is 663774028.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820477369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1565535 + ... + 1566058.

It is an arithmetic number, because the mean of its divisors is an integer number (155013903).

Almost surely, 2^820477366 is an apocalyptic number.

820477366 is a deficient number, since it is larger than the sum of its proper divisors (419633858).

820477366 is a wasteful number, since it uses less digits than its factorization.

820477366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131726.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 820477366 is about 28643.9760857322. The cubic root of 820477366 is about 936.1717571124.

The spelling of 820477366 in words is "eight hundred twenty million, four hundred seventy-seven thousand, three hundred sixty-six".