67642386 has 16 divisors (see below), whose sum is σ = 154611264. Its totient is φ = 19326384.

The previous prime is 67642381. The next prime is 67642387. The reversal of 67642386 is 68324676.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1610533 = 67642386 / (6 + 7 + 6 + 4 + 2 + 3 + 8 + 6).

It is not an unprimeable number, because it can be changed into a prime (67642381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805225 + ... + 805308.

It is an arithmetic number, because the mean of its divisors is an integer number (9663204).

Almost surely, 2^67642386 is an apocalyptic number.

67642386 is an abundant number, since it is smaller than the sum of its proper divisors (86968878).

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

67642386 is a wasteful number, since it uses less digits than its factorization.

67642386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610545.

The product of its digits is 290304, while the sum is 42.

The square root of 67642386 is about 8224.4991336859. The cubic root of 67642386 is about 407.4487340628.

The spelling of 67642386 in words is "sixty-seven million, six hundred forty-two thousand, three hundred eighty-six".