312023140 has 96 divisors (see below), whose sum is σ = 780111360. Its totient is φ = 103334400.

The previous prime is 312023119. The next prime is 312023143. The reversal of 312023140 is 41320213.

It is a happy number.

312023140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (312023143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225250 + ... + 226630.

It is an arithmetic number, because the mean of its divisors is an integer number (8126160).

Almost surely, 2^312023140 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 312023140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390055680).

312023140 is an abundant number, since it is smaller than the sum of its proper divisors (468088220).

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

312023140 is a wasteful number, since it uses less digits than its factorization.

312023140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 312023140 is about 17664.1767427752. The cubic root of 312023140 is about 678.2590558449.

Adding to 312023140 its reverse (41320213), we get a palindrome (353343353).

The spelling of 312023140 in words is "three hundred twelve million, twenty-three thousand, one hundred forty".