68408538 has 16 divisors (see below), whose sum is σ = 149255136. Its totient is φ = 20729840.

The previous prime is 68408513. The next prime is 68408551. The reversal of 68408538 is 83580486.

It is a self number, because there is not a number n which added to its sum of digits gives 68408538.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518181 + ... + 518312.

It is an arithmetic number, because the mean of its divisors is an integer number (9328446).

Almost surely, 2^68408538 is an apocalyptic number.

68408538 is an abundant number, since it is smaller than the sum of its proper divisors (80846598).

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

68408538 is a wasteful number, since it uses less digits than its factorization.

68408538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036509.

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 68408538 is about 8270.9454114992. The cubic root of 68408538 is about 408.9812861200.

The spelling of 68408538 in words is "sixty-eight million, four hundred eight thousand, five hundred thirty-eight".