67427840 has 40 divisors (see below), whose sum is σ = 161674920. Its totient is φ = 26970112.

The previous prime is 67427807. The next prime is 67427849. The reversal of 67427840 is 4872476.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 67427794 and 67427803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67427849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10610 + ... + 15729.

It is an arithmetic number, because the mean of its divisors is an integer number (4041873).

Almost surely, 2^67427840 is an apocalyptic number.

It is an amenable number.

67427840 is an abundant number, since it is smaller than the sum of its proper divisors (94247080).

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

67427840 is an equidigital number, since it uses as much as digits as its factorization.

67427840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26362 (or 26346 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 67427840 is about 8211.4456705260. The cubic root of 67427840 is about 407.0175001078.

The spelling of 67427840 in words is "sixty-seven million, four hundred twenty-seven thousand, eight hundred forty".