68408456 has 8 divisors (see below), whose sum is σ = 128265870. Its totient is φ = 34204224.

The previous prime is 68408443. The next prime is 68408467. The reversal of 68408456 is 65480486.

It can be written as a sum of positive squares in only one way, i.e., 51351556 + 17056900 = 7166^2 + 4130^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4275521 + ... + 4275536.

Almost surely, 2^68408456 is an apocalyptic number.

It is an amenable number.

68408456 is a deficient number, since it is larger than the sum of its proper divisors (59857414).

68408456 is a wasteful number, since it uses less digits than its factorization.

68408456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8551063 (or 8551059 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 68408456 is about 8270.9404543861. The cubic root of 68408456 is about 408.9811227072.

The spelling of 68408456 in words is "sixty-eight million, four hundred eight thousand, four hundred fifty-six".