801591020 has 24 divisors (see below), whose sum is σ = 1683990000. Its totient is φ = 320512832.

The previous prime is 801591017. The next prime is 801591047. The reversal of 801591020 is 20195108.

It is a happy number.

It is an unprimeable number.

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, 59906 + ... + 72054.

It is an arithmetic number, because the mean of its divisors is an integer number (70166250).

Almost surely, 2^801591020 is an apocalyptic number.

It is an amenable number.

801591020 is an abundant number, since it is smaller than the sum of its proper divisors (882398980).

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

801591020 is a wasteful number, since it uses less digits than its factorization.

801591020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15457 (or 15455 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 801591020 is about 28312.3828032894. The cubic root of 801591020 is about 928.9327642608.

The spelling of 801591020 in words is "eight hundred one million, five hundred ninety-one thousand, twenty".