312047730 has 48 divisors (see below), whose sum is σ = 812208384. Its totient is φ = 83122080.

The previous prime is 312047719. The next prime is 312047737. The reversal of 312047730 is 37740213.

It is a junction number, because it is equal to n+sod(n) for n = 312047694 and 312047703.

It is not an unprimeable number, because it can be changed into a prime (312047737) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140287 + ... + 142493.

It is an arithmetic number, because the mean of its divisors is an integer number (16921008).

Almost surely, 2^312047730 is an apocalyptic number.

312047730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

312047730 is an abundant number, since it is smaller than the sum of its proper divisors (500160654).

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

312047730 is a wasteful number, since it uses less digits than its factorization.

312047730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791 (or 3788 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 312047730 is about 17664.8727705580. The cubic root of 312047730 is about 678.2768728483.

Adding to 312047730 its reverse (37740213), we get a palindrome (349787943).

It can be divided in two parts, 31 and 2047730, that added together give a square (2047761 = 1431²).

The spelling of 312047730 in words is "three hundred twelve million, forty-seven thousand, seven hundred thirty".