68392240 has 120 divisors (see below), whose sum is σ = 188291520. Its totient is φ = 23030784.

The previous prime is 68392217. The next prime is 68392301. The reversal of 68392240 is 4229386.

It is a junction number, because it is equal to n+sod(n) for n = 68392196 and 68392205.

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, 286041 + ... + 286279.

It is an arithmetic number, because the mean of its divisors is an integer number (1569096).

Almost surely, 2^68392240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68392240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94145760).

68392240 is an abundant number, since it is smaller than the sum of its proper divisors (119899280).

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

68392240 is a wasteful number, since it uses less digits than its factorization.

68392240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 68392240 is about 8269.9600966389. The cubic root of 68392240 is about 408.9488042758.

The spelling of 68392240 in words is "sixty-eight million, three hundred ninety-two thousand, two hundred forty".