67440240 has 120 divisors (see below), whose sum is σ = 258861408. Its totient is φ = 15413760.

The previous prime is 67440229. The next prime is 67440259. The reversal of 67440240 is 4204476.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1651 + ... + 11730.

Almost surely, 2^67440240 is an apocalyptic number.

67440240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67440240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129430704).

67440240 is an abundant number, since it is smaller than the sum of its proper divisors (191421168).

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

67440240 is a wasteful number, since it uses less digits than its factorization.

67440240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13407 (or 13398 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 67440240 is about 8212.2006794768. The cubic root of 67440240 is about 407.0424487919.

The spelling of 67440240 in words is "sixty-seven million, four hundred forty thousand, two hundred forty".