313138650 has 96 divisors (see below), whose sum is σ = 852856128. Its totient is φ = 75404800.

The previous prime is 313138649. The next prime is 313138667. The reversal of 313138650 is 56831313.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 284902 + ... + 285998.

It is an arithmetic number, because the mean of its divisors is an integer number (8883918).

Almost surely, 2^313138650 is an apocalyptic number.

313138650 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 313138650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426428064).

313138650 is an abundant number, since it is smaller than the sum of its proper divisors (539717478).

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

313138650 is a wasteful number, since it uses less digits than its factorization.

313138650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296 (or 1291 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 313138650 is about 17695.7240597835. The cubic root of 313138650 is about 679.0663730022.

Adding to 313138650 its reverse (56831313), we get a palindrome (369969963).

The spelling of 313138650 in words is "three hundred thirteen million, one hundred thirty-eight thousand, six hundred fifty".