809763540 has 48 divisors (see below), whose sum is σ = 2277108288. Its totient is φ = 215006464.

The previous prime is 809763529. The next prime is 809763547. The reversal of 809763540 is 45367908.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 809763492 and 809763501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809763547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14982 + ... + 42941.

It is an arithmetic number, because the mean of its divisors is an integer number (47439756).

Almost surely, 2^809763540 is an apocalyptic number.

It is an amenable number.

809763540 is an abundant number, since it is smaller than the sum of its proper divisors (1467344748).

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

809763540 is a wasteful number, since it uses less digits than its factorization.

809763540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58168 (or 58166 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 809763540 is about 28456.3444595401. The cubic root of 809763540 is about 932.0790347854.

The spelling of 809763540 in words is "eight hundred nine million, seven hundred sixty-three thousand, five hundred forty".