68340240 has 160 divisors (see below), whose sum is σ = 243734400. Its totient is φ = 17579520.

The previous prime is 68340203. The next prime is 68340247. The reversal of 68340240 is 4204386.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (68340247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62095 + ... + 63185.

It is an arithmetic number, because the mean of its divisors is an integer number (1523340).

Almost surely, 2^68340240 is an apocalyptic number.

68340240 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 68340240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121867200).

68340240 is an abundant number, since it is smaller than the sum of its proper divisors (175394160).

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

68340240 is a wasteful number, since it uses less digits than its factorization.

68340240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 68340240 is about 8266.8155900564. The cubic root of 68340240 is about 408.8451339881.

The spelling of 68340240 in words is "sixty-eight million, three hundred forty thousand, two hundred forty".