340427728 has 10 divisors (see below), whose sum is σ = 659578754. Its totient is φ = 170213856.

The previous prime is 340427707. The next prime is 340427743. The reversal of 340427728 is 827724043.

It can be written as a sum of positive squares in only one way, i.e., 187361344 + 153066384 = 13688^2 + 12372^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10638351 + ... + 10638382.

Almost surely, 2^340427728 is an apocalyptic number.

It is an amenable number.

340427728 is a deficient number, since it is larger than the sum of its proper divisors (319151026).

340427728 is a wasteful number, since it uses less digits than its factorization.

340427728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21276741 (or 21276735 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 340427728 is about 18450.6836729700. The cubic root of 340427728 is about 698.2457625616.

The spelling of 340427728 in words is "three hundred forty million, four hundred twenty-seven thousand, seven hundred twenty-eight".