346778217 has 12 divisors (see below), whose sum is σ = 501458880. Its totient is φ = 230928408.

The previous prime is 346778213. The next prime is 346778231. The reversal of 346778217 is 712877643.

It is not a de Polignac number, because 346778217 - 2² = 346778213 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (346778213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12693 + ... + 29234.

It is an arithmetic number, because the mean of its divisors is an integer number (41788240).

Almost surely, 2^346778217 is an apocalyptic number.

It is an amenable number.

346778217 is a deficient number, since it is larger than the sum of its proper divisors (154680663).

346778217 is a wasteful number, since it uses less digits than its factorization.

346778217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42852 (or 42849 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 346778217 is about 18621.9820910665. The cubic root of 346778217 is about 702.5608358219.

The spelling of 346778217 in words is "three hundred forty-six million, seven hundred seventy-eight thousand, two hundred seventeen".