68641408 has 32 divisors (see below), whose sum is σ = 149181120. Its totient is φ = 31200000.

The previous prime is 68641387. The next prime is 68641477. The reversal of 68641408 is 80414686.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22968 + ... + 25783.

It is an arithmetic number, because the mean of its divisors is an integer number (4661910).

Almost surely, 2^68641408 is an apocalyptic number.

It is an amenable number.

68641408 is an abundant number, since it is smaller than the sum of its proper divisors (80539712).

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

68641408 is a wasteful number, since it uses less digits than its factorization.

68641408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48776 (or 48764 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 68641408 is about 8285.0110440482. The cubic root of 68641408 is about 409.4448325833. Note that the first 3 decimals are identical.

The spelling of 68641408 in words is "sixty-eight million, six hundred forty-one thousand, four hundred eight".