67886389 has 12 divisors (see below), whose sum is σ = 72412704. Its totient is φ = 63629504.

The previous prime is 67886381. The next prime is 67886407. The reversal of 67886389 is 98368876.

It is not a de Polignac number, because 67886389 - 2³ = 67886381 is a prime.

It is a super-2 number, since 2×67886389² = 9217123622918642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67886381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134712 + ... + 135214.

It is an arithmetic number, because the mean of its divisors is an integer number (6034392).

Almost surely, 2^67886389 is an apocalyptic number.

It is an amenable number.

67886389 is a deficient number, since it is larger than the sum of its proper divisors (4526315).

67886389 is a wasteful number, since it uses less digits than its factorization.

67886389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 987 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The square root of 67886389 is about 8239.3196927902. The cubic root of 67886389 is about 407.9380693037.

The spelling of 67886389 in words is "sixty-seven million, eight hundred eighty-six thousand, three hundred eighty-nine".