67278438 has 24 divisors (see below), whose sum is σ = 151169928. Its totient is φ = 22425984.

The previous prime is 67278433. The next prime is 67278443. The reversal of 67278438 is 83487276.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (67278433) and next prime (67278443).

It is a junction number, because it is equal to n+sod(n) for n = 67278393 and 67278402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67278433) 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, 68731 + ... + 69702.

It is an arithmetic number, because the mean of its divisors is an integer number (6298747).

Almost surely, 2^67278438 is an apocalyptic number.

67278438 is an abundant number, since it is smaller than the sum of its proper divisors (83891490).

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

67278438 is a wasteful number, since it uses less digits than its factorization.

67278438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138450 (or 138438 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 67278438 is about 8202.3434456258. The cubic root of 67278438 is about 406.7166639535.

The spelling of 67278438 in words is "sixty-seven million, two hundred seventy-eight thousand, four hundred thirty-eight".