316809144 has 80 divisors (see below), whose sum is σ = 939589200. Its totient is φ = 99387648.

The previous prime is 316809109. The next prime is 316809167. The reversal of 316809144 is 441908613.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 316809099 and 316809108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3364 + ... + 25395.

It is an arithmetic number, because the mean of its divisors is an integer number (11744865).

Almost surely, 2^316809144 is an apocalyptic number.

316809144 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 316809144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (469794600).

316809144 is an abundant number, since it is smaller than the sum of its proper divisors (622780056).

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

316809144 is a wasteful number, since it uses less digits than its factorization.

316809144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28794 (or 28781 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 316809144 is about 17799.1332373237. The cubic root of 316809144 is about 681.7093270873.

The spelling of 316809144 in words is "three hundred sixteen million, eight hundred nine thousand, one hundred forty-four".