810773840 has 40 divisors (see below), whose sum is σ = 1908925440. Its totient is φ = 320201856.

The previous prime is 810773839. The next prime is 810773861. The reversal of 810773840 is 48377018.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 810773794 and 810773803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57824 + ... + 70463.

It is an arithmetic number, because the mean of its divisors is an integer number (47723136).

Almost surely, 2^810773840 is an apocalyptic number.

810773840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

810773840 is an abundant number, since it is smaller than the sum of its proper divisors (1098151600).

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

810773840 is a wasteful number, since it uses less digits than its factorization.

810773840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128379 (or 128373 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 810773840 is about 28474.0906790717. The cubic root of 810773840 is about 932.4665092539.

The spelling of 810773840 in words is "eight hundred ten million, seven hundred seventy-three thousand, eight hundred forty".