67289985 has 36 divisors (see below), whose sum is σ = 135683028. Its totient is φ = 30760128.

The previous prime is 67289977. The next prime is 67289987. The reversal of 67289985 is 58998276.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7568001 + 59721984 = 2751^2 + 7728^2 .

It is not a de Polignac number, because 67289985 - 2³ = 67289977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67289987) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13054 + ... + 17463.

It is an arithmetic number, because the mean of its divisors is an integer number (3768973).

Almost surely, 2^67289985 is an apocalyptic number.

It is an amenable number.

67289985 is an abundant number, since it is smaller than the sum of its proper divisors (68393043).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67289985 is a wasteful number, since it uses less digits than its factorization.

67289985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30542 (or 30532 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 67289985 is about 8203.0472996320. The cubic root of 67289985 is about 406.7399308862.

The spelling of 67289985 in words is "sixty-seven million, two hundred eighty-nine thousand, nine hundred eighty-five".