312712780 has 24 divisors (see below), whose sum is σ = 657217008. Its totient is φ = 124986048.

The previous prime is 312712759. The next prime is 312712783. The reversal of 312712780 is 87217213.

It is not an unprimeable number, because it can be changed into a prime (312712783) 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, 23062 + ... + 34018.

It is an arithmetic number, because the mean of its divisors is an integer number (27384042).

Almost surely, 2^312712780 is an apocalyptic number.

It is an amenable number.

312712780 is an abundant number, since it is smaller than the sum of its proper divisors (344504228).

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

312712780 is a wasteful number, since it uses less digits than its factorization.

312712780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12393 (or 12391 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 312712780 is about 17683.6868327846. The cubic root of 312712780 is about 678.7583888796.

Adding to 312712780 its reverse (87217213), we get a palindrome (399929993).

The spelling of 312712780 in words is "three hundred twelve million, seven hundred twelve thousand, seven hundred eighty".