67989285 has 48 divisors (see below), whose sum is σ = 145052544. Its totient is φ = 28688256.

The previous prime is 67989283. The next prime is 67989287. The reversal of 67989285 is 58298976.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (67989283) and next prime (67989287).

It is not a de Polignac number, because 67989285 - 2¹ = 67989283 is a prime.

It is a super-2 number, since 2×67989285² = 9245085749622450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67989281) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 4207 + ... + 12396.

It is an arithmetic number, because the mean of its divisors is an integer number (3021928).

Almost surely, 2^67989285 is an apocalyptic number.

67989285 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

67989285 is an abundant number, since it is smaller than the sum of its proper divisors (77063259).

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

67989285 is a wasteful number, since it uses less digits than its factorization.

67989285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16634 (or 16631 counting only the distinct ones).

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

The square root of 67989285 is about 8245.5615333342. The cubic root of 67989285 is about 408.1440703722.

The spelling of 67989285 in words is "sixty-seven million, nine hundred eighty-nine thousand, two hundred eighty-five".