67243240 has 32 divisors (see below), whose sum is σ = 151533000. Its totient is φ = 26855424.

The previous prime is 67243219. The next prime is 67243243. The reversal of 67243240 is 4234276.

It can be written as a sum of positive squares in 4 ways, for example, as 28579716 + 38663524 = 5346^2 + 6218^2 .

It is a junction number, because it is equal to n+sod(n) for n = 67243199 and 67243208.

It is not an unprimeable number, because it can be changed into a prime (67243243) 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, 44416 + ... + 45904.

Almost surely, 2^67243240 is an apocalyptic number.

It is an amenable number.

67243240 is an abundant number, since it is smaller than the sum of its proper divisors (84289760).

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

67243240 is a wasteful number, since it uses less digits than its factorization.

67243240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629 (or 2625 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 67243240 is about 8200.1975585958. The cubic root of 67243240 is about 406.6457243836.

The spelling of 67243240 in words is "sixty-seven million, two hundred forty-three thousand, two hundred forty".