345680656 has 20 divisors (see below), whose sum is σ = 680737804. Its totient is φ = 170006400.

The previous prime is 345680653. The next prime is 345680663. The reversal of 345680656 is 656086543.

It can be written as a sum of positive squares in 2 ways, for example, as 163430656 + 182250000 = 12784^2 + 13500^2 .

It is not an unprimeable number, because it can be changed into a prime (345680653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176115 + ... + 178066.

Almost surely, 2^345680656 is an apocalyptic number.

It is an amenable number.

345680656 is a deficient number, since it is larger than the sum of its proper divisors (335057148).

345680656 is a wasteful number, since it uses less digits than its factorization.

345680656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354250 (or 354244 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The square root of 345680656 is about 18592.4892362481. The cubic root of 345680656 is about 701.8188454189.

The spelling of 345680656 in words is "three hundred forty-five million, six hundred eighty thousand, six hundred fifty-six".