810323136 has 224 divisors, whose sum is σ = 2811637760. Its totient is φ = 223948800.

The previous prime is 810323117. The next prime is 810323147. The reversal of 810323136 is 631323018.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 373896 + ... + 376056.

Almost surely, 2^810323136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 810323136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1405818880).

810323136 is an abundant number, since it is smaller than the sum of its proper divisors (2001314624).

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

810323136 is a wasteful number, since it uses less digits than its factorization.

810323136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220 (or 2204 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 810323136 is about 28466.1752963056. The cubic root of 810323136 is about 932.2936931683.

The spelling of 810323136 in words is "eight hundred ten million, three hundred twenty-three thousand, one hundred thirty-six".