312728841 has 6 divisors (see below), whose sum is σ = 451719450. Its totient is φ = 208485888.

The previous prime is 312728791. The next prime is 312728863. The reversal of 312728841 is 148827213.

It can be written as a sum of positive squares in only one way, i.e., 301196025 + 11532816 = 17355^2 + 3396^2 .

It is not a de Polignac number, because 312728841 - 2⁶ = 312728777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312728796 and 312728805.

It is not an unprimeable number, because it can be changed into a prime (312728881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17373816 + ... + 17373833.

It is an arithmetic number, because the mean of its divisors is an integer number (75286575).

Almost surely, 2^312728841 is an apocalyptic number.

It is an amenable number.

312728841 is a deficient number, since it is larger than the sum of its proper divisors (138990609).

312728841 is a wasteful number, since it uses less digits than its factorization.

312728841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34747655 (or 34747652 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 312728841 is about 17684.1409460567. The cubic root of 312728841 is about 678.7700090761.

The spelling of 312728841 in words is "three hundred twelve million, seven hundred twenty-eight thousand, eight hundred forty-one".