345428 has 6 divisors (see below), whose sum is σ = 604506. Its totient is φ = 172712.

The previous prime is 345413. The next prime is 345431. The reversal of 345428 is 824543.

It can be written as a sum of positive squares in only one way, i.e., 315844 + 29584 = 562^2 + 172^2 .

It is a junction number, because it is equal to n+sod(n) for n = 345397 and 345406.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345428.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43175 + ... + 43182.

It is an arithmetic number, because the mean of its divisors is an integer number (100751).

2³⁴⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

345428 is a deficient number, since it is larger than the sum of its proper divisors (259078).

345428 is a wasteful number, since it uses less digits than its factorization.

345428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86361 (or 86359 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 345428 is about 587.7312310912. The cubic root of 345428 is about 70.1647818628.

The spelling of 345428 in words is "three hundred forty-five thousand, four hundred twenty-eight".