67811420 has 12 divisors (see below), whose sum is σ = 142404024. Its totient is φ = 27124560.

The previous prime is 67811369. The next prime is 67811441. The reversal of 67811420 is 2411876.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1695266 + ... + 1695305.

It is an arithmetic number, because the mean of its divisors is an integer number (11867002).

Almost surely, 2^67811420 is an apocalyptic number.

It is an amenable number.

67811420 is an abundant number, since it is smaller than the sum of its proper divisors (74592604).

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

67811420 is a wasteful number, since it uses less digits than its factorization.

67811420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390580 (or 3390578 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 67811420 is about 8234.7689706512. The cubic root of 67811420 is about 407.7878478612.

The spelling of 67811420 in words is "sixty-seven million, eight hundred eleven thousand, four hundred twenty".