68142906 has 24 divisors (see below), whose sum is σ = 159000660. Its totient is φ = 20966976.

The previous prime is 68142901. The next prime is 68142913. The reversal of 68142906 is 60924186.

It can be written as a sum of positive squares in 2 ways, for example, as 65755881 + 2387025 = 8109^2 + 1545^2 .

It is not an unprimeable number, because it can be changed into a prime (68142901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145371 + ... + 145838.

Almost surely, 2^68142906 is an apocalyptic number.

68142906 is an abundant number, since it is smaller than the sum of its proper divisors (90857754).

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

68142906 is a wasteful number, since it uses less digits than its factorization.

68142906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291230 (or 291227 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 68142906 is about 8254.8716525455. The cubic root of 68142906 is about 408.4512380703.

The spelling of 68142906 in words is "sixty-eight million, one hundred forty-two thousand, nine hundred six".