68305240 has 16 divisors (see below), whose sum is σ = 153686880. Its totient is φ = 27322080.

The previous prime is 68305231. The next prime is 68305249. The reversal of 68305240 is 4250386.

It is an interprime number because it is at equal distance from previous prime (68305231) and next prime (68305249).

It is a super-2 number, since 2×68305240² = 9331211622915200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68305199 and 68305208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68305249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853776 + ... + 853855.

It is an arithmetic number, because the mean of its divisors is an integer number (9605430).

Almost surely, 2^68305240 is an apocalyptic number.

It is an amenable number.

68305240 is an abundant number, since it is smaller than the sum of its proper divisors (85381640).

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

68305240 is a wasteful number, since it uses less digits than its factorization.

68305240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707642 (or 1707638 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 68305240 is about 8264.6984216001. The cubic root of 68305240 is about 408.7753262963.

The spelling of 68305240 in words is "sixty-eight million, three hundred five thousand, two hundred forty".