312540020 has 24 divisors (see below), whose sum is σ = 706821864. Its totient is φ = 115399296.

The previous prime is 312539977. The next prime is 312540023. The reversal of 312540020 is 20045213.

It can be written as a sum of positive squares in 4 ways, for example, as 169744 + 312370276 = 412^2 + 17674^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312540023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600779 + ... + 601298.

It is an arithmetic number, because the mean of its divisors is an integer number (29450911).

Almost surely, 2^312540020 is an apocalyptic number.

It is an amenable number.

312540020 is an abundant number, since it is smaller than the sum of its proper divisors (394281844).

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

312540020 is a wasteful number, since it uses less digits than its factorization.

312540020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202099 (or 1202097 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 312540020 is about 17678.8014299613. The cubic root of 312540020 is about 678.6333711770.

Adding to 312540020 its reverse (20045213), we get a palindrome (332585233).

The spelling of 312540020 in words is "three hundred twelve million, five hundred forty thousand, twenty".