345216398 has 8 divisors (see below), whose sum is σ = 520508208. Its totient is φ = 171713664.

The previous prime is 345216383. The next prime is 345216437. The reversal of 345216398 is 893612543.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×345216398² = 238348722896188808, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446786 + ... + 447557.

It is an arithmetic number, because the mean of its divisors is an integer number (65063526).

Almost surely, 2^345216398 is an apocalyptic number.

345216398 is a deficient number, since it is larger than the sum of its proper divisors (175291810).

345216398 is a wasteful number, since it uses less digits than its factorization.

345216398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894538.

The product of its digits is 155520, while the sum is 41.

The square root of 345216398 is about 18579.9999461787. Note that the first 4 decimals coincide. The cubic root of 345216398 is about 701.5045177481.

The spelling of 345216398 in words is "three hundred forty-five million, two hundred sixteen thousand, three hundred ninety-eight".