801500820 has 48 divisors (see below), whose sum is σ = 2272623360. Its totient is φ = 211026816.

The previous prime is 801500801. The next prime is 801500863. The reversal of 801500820 is 28005108.

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, 79807 + ... + 89286.

It is an arithmetic number, because the mean of its divisors is an integer number (47346320).

Almost surely, 2^801500820 is an apocalyptic number.

It is an amenable number.

801500820 is an abundant number, since it is smaller than the sum of its proper divisors (1471122540).

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

801500820 is a wasteful number, since it uses less digits than its factorization.

801500820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169184 (or 169182 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 801500820 is about 28310.7898158988. The cubic root of 801500820 is about 928.8979198592.

Adding to 801500820 its reverse (28005108), we get a palindrome (829505928).

The spelling of 801500820 in words is "eight hundred one million, five hundred thousand, eight hundred twenty".