813446840 has 16 divisors (see below), whose sum is σ = 1830255480. Its totient is φ = 325378720.

The previous prime is 813446827. The next prime is 813446857. The reversal of 813446840 is 48644318.

813446840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 813446794 and 813446803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10168046 + ... + 10168125.

Almost surely, 2^813446840 is an apocalyptic number.

It is an amenable number.

813446840 is an abundant number, since it is smaller than the sum of its proper divisors (1016808640).

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

813446840 is a wasteful number, since it uses less digits than its factorization.

813446840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20336182 (or 20336178 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 813446840 is about 28520.9894639018. The cubic root of 813446840 is about 933.4901193524.

The spelling of 813446840 in words is "eight hundred thirteen million, four hundred forty-six thousand, eight hundred forty".