68638104 has 80 divisors (see below), whose sum is σ = 195018120. Its totient is φ = 22550400.

The previous prime is 68638091. The next prime is 68638109. The reversal of 68638104 is 40183686.

It is a happy number.

68638104 is a `hidden beast` number, since 6 + 8 + 638 + 10 + 4 = 666.

It is a super-2 number, since 2×68638104² = 9422378641429632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68638109) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 46579 + ... + 48029.

Almost surely, 2^68638104 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 68638104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97509060).

68638104 is an abundant number, since it is smaller than the sum of its proper divisors (126380016).

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

68638104 is a wasteful number, since it uses less digits than its factorization.

68638104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542 (or 1529 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 68638104 is about 8284.8116454148. The cubic root of 68638104 is about 409.4382630433.

The spelling of 68638104 in words is "sixty-eight million, six hundred thirty-eight thousand, one hundred four".