68901638 has 24 divisors (see below), whose sum is σ = 117815400. Its totient is φ = 30124224.

The previous prime is 68901611. The next prime is 68901641. The reversal of 68901638 is 83610986.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 68901595 and 68901604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1058 + ... + 11786.

It is an arithmetic number, because the mean of its divisors is an integer number (4908975).

Almost surely, 2^68901638 is an apocalyptic number.

68901638 is a deficient number, since it is larger than the sum of its proper divisors (48913762).

68901638 is a wasteful number, since it uses less digits than its factorization.

68901638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10776 (or 10763 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 68901638 is about 8300.7010547303. The cubic root of 68901638 is about 409.9616025909.

The spelling of 68901638 in words is "sixty-eight million, nine hundred one thousand, six hundred thirty-eight".