68335240 has 32 divisors (see below), whose sum is σ = 162800280. Its totient is φ = 25725952.

The previous prime is 68335217. The next prime is 68335249. The reversal of 68335240 is 4253386.

It can be written as a sum of positive squares in 4 ways, for example, as 67996516 + 338724 = 8246^2 + 582^2 .

It is not an unprimeable number, because it can be changed into a prime (68335249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49567 + ... + 50926.

Almost surely, 2^68335240 is an apocalyptic number.

It is an amenable number.

68335240 is an abundant number, since it is smaller than the sum of its proper divisors (94465040).

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

68335240 is a wasteful number, since it uses less digits than its factorization.

68335240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100521 (or 100517 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 68335240 is about 8266.5131706179. The cubic root of 68335240 is about 408.8351629202.

The spelling of 68335240 in words is "sixty-eight million, three hundred thirty-five thousand, two hundred forty".