340439401 has 3 divisors (see below), whose sum is σ = 340457853. Its totient is φ = 340420950.

The previous prime is 340439339. The next prime is 340439413. The reversal of 340439401 is 104934043.

The square root of 340439401 is 18451.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 104934043 = 3581 ⋅29303.

It is a de Polignac number, because none of the positive numbers 2^k-340439401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340439401.

It is not an unprimeable number, because it can be changed into a prime (340439431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9226 + ... + 27676.

It is an arithmetic number, because the mean of its divisors is an integer number (113485951).

Almost surely, 2^340439401 is an apocalyptic number.

340439401 is the 18451-st square number.

340439401 is the 9226-th centered octagonal number.

It is an amenable number.

340439401 is a deficient number, since it is larger than the sum of its proper divisors (18452).

340439401 is an frugal number, since it uses more digits than its factorization.

340439401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36902 (or 18451 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The cubic root of 340439401 is about 698.2537432370.

Multiplying 340439401 by its product of nonzero digits (5184), we get a square (1764837854784 = 1328472²).

The spelling of 340439401 in words is "three hundred forty million, four hundred thirty-nine thousand, four hundred one".