340728769 has 4 divisors (see below), whose sum is σ = 340765744. Its totient is φ = 340691796.

The previous prime is 340728763. The next prime is 340728809. The reversal of 340728769 is 967827043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 967827043 = 28219 ⋅34297.

It is a cyclic number.

It is not a de Polignac number, because 340728769 - 2⁹ = 340728257 is a prime.

It is a super-2 number, since 2×340728769² = 232192188048510722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340728763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7714 + ... + 27220.

It is an arithmetic number, because the mean of its divisors is an integer number (85191436).

Almost surely, 2^340728769 is an apocalyptic number.

It is an amenable number.

340728769 is a deficient number, since it is larger than the sum of its proper divisors (36975).

340728769 is a wasteful number, since it uses less digits than its factorization.

340728769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36974.

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 340728769 is about 18458.8398606196. The cubic root of 340728769 is about 698.4515220180.

The spelling of 340728769 in words is "three hundred forty million, seven hundred twenty-eight thousand, seven hundred sixty-nine".