820790140 has 48 divisors (see below), whose sum is σ = 1764330624. Its totient is φ = 320601600.

The previous prime is 820790099. The next prime is 820790183. The reversal of 820790140 is 41097028.

820790140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620680 + ... + 622000.

It is an arithmetic number, because the mean of its divisors is an integer number (36756888).

Almost surely, 2^820790140 is an apocalyptic number.

It is an amenable number.

820790140 is an abundant number, since it is smaller than the sum of its proper divisors (943540484).

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

820790140 is a wasteful number, since it uses less digits than its factorization.

820790140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038 (or 2036 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 820790140 is about 28649.4352474879. The cubic root of 820790140 is about 936.2907012775.

The spelling of 820790140 in words is "eight hundred twenty million, seven hundred ninety thousand, one hundred forty".