67920345 has 72 divisors (see below), whose sum is σ = 128738376. Its totient is φ = 33094656.

The previous prime is 67920337. The next prime is 67920361. The reversal of 67920345 is 54302976.

It can be written as a sum of positive squares in 4 ways, for example, as 3326976 + 64593369 = 1824^2 + 8037^2 .

It is not a de Polignac number, because 67920345 - 2³ = 67920337 is a prime.

It is a super-2 number, since 2×67920345² = 9226346529838050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 601009 + ... + 601121.

It is an arithmetic number, because the mean of its divisors is an integer number (1788033).

Almost surely, 2^67920345 is an apocalyptic number.

It is an amenable number.

67920345 is a deficient number, since it is larger than the sum of its proper divisors (60818031).

67920345 is a wasteful number, since it uses less digits than its factorization.

67920345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 67920345 is about 8241.3800422017. The cubic root of 67920345 is about 408.0060732948.

It can be divided in two parts, 67920 and 345, that added together give a triangular number (68265 = T₃₆₉).

The spelling of 67920345 in words is "sixty-seven million, nine hundred twenty thousand, three hundred forty-five".