68409738 has 16 divisors (see below), whose sum is σ = 152021760. Its totient is φ = 22803228.

The previous prime is 68409703. The next prime is 68409739. The reversal of 68409738 is 83790486.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 68409693 and 68409702.

It is not an unprimeable number, because it can be changed into a prime (68409739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633370 + ... + 633477.

It is an arithmetic number, because the mean of its divisors is an integer number (9501360).

Almost surely, 2^68409738 is an apocalyptic number.

68409738 is an abundant number, since it is smaller than the sum of its proper divisors (83612022).

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

68409738 is a wasteful number, since it uses less digits than its factorization.

68409738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266858 (or 1266852 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 68409738 is about 8271.0179542787. The cubic root of 68409738 is about 408.9836775109.

The spelling of 68409738 in words is "sixty-eight million, four hundred nine thousand, seven hundred thirty-eight".