820934620 has 24 divisors (see below), whose sum is σ = 1880687088. Its totient is φ = 298521600.

The previous prime is 820934557. The next prime is 820934627. The reversal of 820934620 is 26439028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820934627) 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 7 ways as a sum of consecutive naturals, for example, 1865541 + ... + 1865980.

It is an arithmetic number, because the mean of its divisors is an integer number (78361962).

Almost surely, 2^820934620 is an apocalyptic number.

It is an amenable number.

820934620 is an abundant number, since it is smaller than the sum of its proper divisors (1059752468).

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

820934620 is a wasteful number, since it uses less digits than its factorization.

820934620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731541 (or 3731539 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 820934620 is about 28651.9566522079. The cubic root of 820934620 is about 936.3456350693.

The spelling of 820934620 in words is "eight hundred twenty million, nine hundred thirty-four thousand, six hundred twenty".