68540208 has 60 divisors (see below), whose sum is σ = 194638584. Its totient is φ = 20768000.

The previous prime is 68540203. The next prime is 68540221. The reversal of 68540208 is 80204586.

It is a super-2 number, since 2×68540208² = 9395520225366528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (68540203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93 + ... + 11708.

Almost surely, 2^68540208 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 68540208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97319292).

68540208 is an abundant number, since it is smaller than the sum of its proper divisors (126098376).

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

68540208 is a wasteful number, since it uses less digits than its factorization.

68540208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11834 (or 11817 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 68540208 is about 8278.9013763905. The cubic root of 68540208 is about 409.2435148544.

The spelling of 68540208 in words is "sixty-eight million, five hundred forty thousand, two hundred eight".