67243540 has 48 divisors (see below), whose sum is σ = 173803392. Its totient is φ = 21280896.

The previous prime is 67243523. The next prime is 67243549. The reversal of 67243540 is 4534276.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67243549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16654 + ... + 20293.

It is an arithmetic number, because the mean of its divisors is an integer number (3620904).

Almost surely, 2^67243540 is an apocalyptic number.

It is an amenable number.

67243540 is an abundant number, since it is smaller than the sum of its proper divisors (106559852).

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

67243540 is a wasteful number, since it uses less digits than its factorization.

67243540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36976 (or 36974 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 67243540 is about 8200.2158508176. The cubic root of 67243540 is about 406.6463291212.

The spelling of 67243540 in words is "sixty-seven million, two hundred forty-three thousand, five hundred forty".