344643646 has 4 divisors (see below), whose sum is σ = 516965472. Its totient is φ = 172321822.

The previous prime is 344643623. The next prime is 344643653. The reversal of 344643646 is 646346443.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646346443 = 17 ⋅38020379.

It is a junction number, because it is equal to n+sod(n) for n = 344643599 and 344643608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86160910 + ... + 86160913.

It is an arithmetic number, because the mean of its divisors is an integer number (129241368).

Almost surely, 2^344643646 is an apocalyptic number.

344643646 is a deficient number, since it is larger than the sum of its proper divisors (172321826).

344643646 is a wasteful number, since it uses less digits than its factorization.

344643646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172321825.

The product of its digits is 497664, while the sum is 40.

The square root of 344643646 is about 18564.5804154040. The cubic root of 344643646 is about 701.1163452603.

The spelling of 344643646 in words is "three hundred forty-four million, six hundred forty-three thousand, six hundred forty-six".