801809380 has 12 divisors (see below), whose sum is σ = 1683799740. Its totient is φ = 320723744.

The previous prime is 801809377. The next prime is 801809381. The reversal of 801809380 is 83908108.

It can be written as a sum of positive squares in 2 ways, for example, as 164044864 + 637764516 = 12808^2 + 25254^2 .

It is not an unprimeable number, because it can be changed into a prime (801809381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20045215 + ... + 20045254.

It is an arithmetic number, because the mean of its divisors is an integer number (140316645).

Almost surely, 2^801809380 is an apocalyptic number.

It is an amenable number.

801809380 is an abundant number, since it is smaller than the sum of its proper divisors (881990360).

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

801809380 is a wasteful number, since it uses less digits than its factorization.

801809380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40090478 (or 40090476 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 801809380 is about 28316.2388039090. The cubic root of 801809380 is about 929.0171062497.

The spelling of 801809380 in words is "eight hundred one million, eight hundred nine thousand, three hundred eighty".