312047280 has 60 divisors (see below), whose sum is σ = 1047961200. Its totient is φ = 83212416.

The previous prime is 312047231. The next prime is 312047287. The reversal of 312047280 is 82740213.

312047280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312047287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215980 + ... + 217419.

It is an arithmetic number, because the mean of its divisors is an integer number (17466020).

Almost surely, 2^312047280 is an apocalyptic number.

312047280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312047280 is an abundant number, since it is smaller than the sum of its proper divisors (735913920).

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

312047280 is a wasteful number, since it uses less digits than its factorization.

312047280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433418 (or 433409 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 312047280 is about 17664.8600334110. The cubic root of 312047280 is about 678.2765468034.

Adding to 312047280 its reverse (82740213), we get a palindrome (394787493).

The spelling of 312047280 in words is "three hundred twelve million, forty-seven thousand, two hundred eighty".