345656978 has 16 divisors (see below), whose sum is σ = 536619384. Its totient is φ = 166871040.

The previous prime is 345656963. The next prime is 345656981. The reversal of 345656978 is 879656543.

It can be written as a sum of positive squares in 4 ways, for example, as 217356049 + 128300929 = 14743^2 + 11327^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13775 + ... + 29682.

Almost surely, 2^345656978 is an apocalyptic number.

345656978 is a deficient number, since it is larger than the sum of its proper divisors (190962406).

345656978 is a wasteful number, since it uses less digits than its factorization.

345656978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43597.

The product of its digits is 5443200, while the sum is 53.

The square root of 345656978 is about 18591.8524628397. The cubic root of 345656978 is about 701.8028209506.

The spelling of 345656978 in words is "three hundred forty-five million, six hundred fifty-six thousand, nine hundred seventy-eight".