78101238 has 32 divisors (see below), whose sum is σ = 164851200. Its totient is φ = 24618176.

The previous prime is 78101203. The next prime is 78101239. The reversal of 78101238 is 83210187.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78101239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9103 + ... + 15461.

It is an arithmetic number, because the mean of its divisors is an integer number (5151600).

Almost surely, 2^78101238 is an apocalyptic number.

78101238 is an abundant number, since it is smaller than the sum of its proper divisors (86749962).

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

78101238 is a wasteful number, since it uses less digits than its factorization.

78101238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6476.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 78101238 is about 8837.4904809001. The cubic root of 78101238 is about 427.4506409960.

The spelling of 78101238 in words is "seventy-eight million, one hundred one thousand, two hundred thirty-eight".