820426704 has 40 divisors (see below), whose sum is σ = 2192523360. Its totient is φ = 264044928.

The previous prime is 820426703. The next prime is 820426709. The reversal of 820426704 is 407624028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820426703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293302 + ... + 296085.

It is an arithmetic number, because the mean of its divisors is an integer number (54813084).

Almost surely, 2^820426704 is an apocalyptic number.

It is an amenable number.

820426704 is an abundant number, since it is smaller than the sum of its proper divisors (1372096656).

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

820426704 is a wasteful number, since it uses less digits than its factorization.

820426704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589427 (or 589421 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 820426704 is about 28643.0917325627. The cubic root of 820426704 is about 936.1524881227.

The spelling of 820426704 in words is "eight hundred twenty million, four hundred twenty-six thousand, seven hundred four".