809632145 has 24 divisors (see below), whose sum is σ = 1132704000. Its totient is φ = 553936992.

The previous prime is 809632133. The next prime is 809632147. The reversal of 809632145 is 541236908.

It is a happy number.

It is not a de Polignac number, because 809632145 - 2⁴ = 809632129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 809632099 and 809632108.

It is not an unprimeable number, because it can be changed into a prime (809632147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113906 + ... + 120804.

It is an arithmetic number, because the mean of its divisors is an integer number (47196000).

Almost surely, 2^809632145 is an apocalyptic number.

It is an amenable number.

809632145 is a deficient number, since it is larger than the sum of its proper divisors (323071855).

809632145 is a wasteful number, since it uses less digits than its factorization.

809632145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7397 (or 7390 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 809632145 is about 28454.0356540158. The cubic root of 809632145 is about 932.0286179483.

The spelling of 809632145 in words is "eight hundred nine million, six hundred thirty-two thousand, one hundred forty-five".