313123420 has 48 divisors (see below), whose sum is σ = 708301440. Its totient is φ = 115891776.

The previous prime is 313123333. The next prime is 313123441. The reversal of 313123420 is 24321313.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6759 + ... + 25921.

It is an arithmetic number, because the mean of its divisors is an integer number (14756280).

Almost surely, 2^313123420 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 313123420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354150720).

313123420 is an abundant number, since it is smaller than the sum of its proper divisors (395178020).

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

313123420 is a wasteful number, since it uses less digits than its factorization.

313123420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19234 (or 19232 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 313123420 is about 17695.2937246037. The cubic root of 313123420 is about 679.0553636634.

Adding to 313123420 its reverse (24321313), we get a palindrome (337444733).

The spelling of 313123420 in words is "three hundred thirteen million, one hundred twenty-three thousand, four hundred twenty".