809660148 has 96 divisors (see below), whose sum is σ = 2177280000. Its totient is φ = 231598080.

The previous prime is 809660143. The next prime is 809660183. The reversal of 809660148 is 841066908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809660143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1125733 + ... + 1126451.

It is an arithmetic number, because the mean of its divisors is an integer number (22680000).

Almost surely, 2^809660148 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 809660148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1088640000).

809660148 is an abundant number, since it is smaller than the sum of its proper divisors (1367619852).

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

809660148 is a wasteful number, since it uses less digits than its factorization.

809660148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 809660148 is about 28454.5277240723. The cubic root of 809660148 is about 932.0393632794.

The spelling of 809660148 in words is "eight hundred nine million, six hundred sixty thousand, one hundred forty-eight".