68144402 has 8 divisors (see below), whose sum is σ = 103154700. Its totient is φ = 33759504.

The previous prime is 68144389. The next prime is 68144441. The reversal of 68144402 is 20444186.

It can be written as a sum of positive squares in 2 ways, for example, as 56235001 + 11909401 = 7499^2 + 3451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156077 + ... + 156512.

Almost surely, 2^68144402 is an apocalyptic number.

68144402 is a deficient number, since it is larger than the sum of its proper divisors (35010298).

68144402 is a wasteful number, since it uses less digits than its factorization.

68144402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312700.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 68144402 is about 8254.9622652075. The cubic root of 68144402 is about 408.4542270759.

Adding to 68144402 its reverse (20444186), we get a palindrome (88588588).

The spelling of 68144402 in words is "sixty-eight million, one hundred forty-four thousand, four hundred two".