67986090 has 24 divisors (see below), whose sum is σ = 176764068. Its totient is φ = 18129600.

The previous prime is 67986031. The next prime is 67986097. The reversal of 67986090 is 9068976.

It can be written as a sum of positive squares in 2 ways, for example, as 55219761 + 12766329 = 7431^2 + 3573^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67986097) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 377611 + ... + 377790.

Almost surely, 2^67986090 is an apocalyptic number.

67986090 is an abundant number, since it is smaller than the sum of its proper divisors (108777978).

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

67986090 is a wasteful number, since it uses less digits than its factorization.

67986090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755414 (or 755411 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 67986090 is about 8245.3677904627. The cubic root of 67986090 is about 408.1376770083.

The spelling of 67986090 in words is "sixty-seven million, nine hundred eighty-six thousand, ninety".