312016540 has 24 divisors (see below), whose sum is σ = 714802032. Its totient is φ = 113460480.

The previous prime is 312016531. The next prime is 312016543. The reversal of 312016540 is 45610213.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312016543) 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, 708909 + ... + 709348.

It is an arithmetic number, because the mean of its divisors is an integer number (29783418).

Almost surely, 2^312016540 is an apocalyptic number.

It is an amenable number.

312016540 is an abundant number, since it is smaller than the sum of its proper divisors (402785492).

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

312016540 is a wasteful number, since it uses less digits than its factorization.

312016540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418277 (or 1418275 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 312016540 is about 17663.9899230044. The cubic root of 312016540 is about 678.2542735700.

Adding to 312016540 its reverse (45610213), we get a palindrome (357626753).

The spelling of 312016540 in words is "three hundred twelve million, sixteen thousand, five hundred forty".