813844650 has 96 divisors (see below), whose sum is σ = 2114864640. Its totient is φ = 206726080.

The previous prime is 813844639. The next prime is 813844657. The reversal of 813844650 is 56448318.

It is a super-2 number, since 2×813844650² = 1324686228667245000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813844599 and 813844608.

It is not an unprimeable number, because it can be changed into a prime (813844657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1445269 + ... + 1445831.

It is an arithmetic number, because the mean of its divisors is an integer number (22029840).

Almost surely, 2^813844650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813844650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1057432320).

813844650 is an abundant number, since it is smaller than the sum of its proper divisors (1301019990).

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

813844650 is a wasteful number, since it uses less digits than its factorization.

813844650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 813844650 is about 28527.9625981247. The cubic root of 813844650 is about 933.6422666377.

The spelling of 813844650 in words is "eight hundred thirteen million, eight hundred forty-four thousand, six hundred fifty".