312305540 has 12 divisors (see below), whose sum is σ = 655841676. Its totient is φ = 124922208.

The previous prime is 312305533. The next prime is 312305561. The reversal of 312305540 is 45503213.

It can be written as a sum of positive squares in 2 ways, for example, as 46485124 + 265820416 = 6818^2 + 16304^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7807619 + ... + 7807658.

It is an arithmetic number, because the mean of its divisors is an integer number (54653473).

Almost surely, 2^312305540 is an apocalyptic number.

It is an amenable number.

312305540 is an abundant number, since it is smaller than the sum of its proper divisors (343536136).

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

312305540 is a wasteful number, since it uses less digits than its factorization.

312305540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15615286 (or 15615284 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 312305540 is about 17672.1685143618. The cubic root of 312305540 is about 678.4636161019.

Adding to 312305540 its reverse (45503213), we get a palindrome (357808753).

The spelling of 312305540 in words is "three hundred twelve million, three hundred five thousand, five hundred forty".