68435138 has 4 divisors (see below), whose sum is σ = 102652710. Its totient is φ = 34217568.

The previous prime is 68435123. The next prime is 68435141. The reversal of 68435138 is 83153486.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 57259489 + 11175649 = 7567^2 + 3343^2 .

It is a super-2 number, since 2×68435138² = 9366736226158088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17108783 + ... + 17108786.

Almost surely, 2^68435138 is an apocalyptic number.

68435138 is a deficient number, since it is larger than the sum of its proper divisors (34217572).

68435138 is a wasteful number, since it uses less digits than its factorization.

68435138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34217571.

The product of its digits is 69120, while the sum is 38.

The square root of 68435138 is about 8272.5532938749. The cubic root of 68435138 is about 409.0342887265.

The spelling of 68435138 in words is "sixty-eight million, four hundred thirty-five thousand, one hundred thirty-eight".