68624138 has 16 divisors (see below), whose sum is σ = 118900224. Its totient is φ = 29357760.

The previous prime is 68624137. The next prime is 68624177. The reversal of 68624138 is 83142686.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68624131) 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, 91370 + ... + 92117.

It is an arithmetic number, because the mean of its divisors is an integer number (7431264).

Almost surely, 2^68624138 is an apocalyptic number.

68624138 is a deficient number, since it is larger than the sum of its proper divisors (50276086).

68624138 is a wasteful number, since it uses less digits than its factorization.

68624138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183517.

The product of its digits is 55296, while the sum is 38.

The square root of 68624138 is about 8283.9687348517. The cubic root of 68624138 is about 409.4104912842.

The spelling of 68624138 in words is "sixty-eight million, six hundred twenty-four thousand, one hundred thirty-eight".