312480729 has 12 divisors (see below), whose sum is σ = 492394032. Its totient is φ = 189382200.

The previous prime is 312480667. The next prime is 312480781. The reversal of 312480729 is 927084213.

It is not a de Polignac number, because 312480729 - 2⁷ = 312480601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312480693 and 312480702.

It is not an unprimeable number, because it can be changed into a prime (312480529) 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, 1578087 + ... + 1578284.

It is an arithmetic number, because the mean of its divisors is an integer number (41032836).

Almost surely, 2^312480729 is an apocalyptic number.

It is an amenable number.

312480729 is a deficient number, since it is larger than the sum of its proper divisors (179913303).

312480729 is a wasteful number, since it uses less digits than its factorization.

312480729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156388 (or 3156385 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 312480729 is about 17677.1244550690. The cubic root of 312480729 is about 678.5904546508.

The spelling of 312480729 in words is "three hundred twelve million, four hundred eighty thousand, seven hundred twenty-nine".