78100208 has 20 divisors (see below), whose sum is σ = 152412120. Its totient is φ = 38768064.

The previous prime is 78100207. The next prime is 78100271. The reversal of 78100208 is 80200187.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78100201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15335 + ... + 19782.

It is an arithmetic number, because the mean of its divisors is an integer number (7620606).

Almost surely, 2^78100208 is an apocalyptic number.

It is an amenable number.

78100208 is a deficient number, since it is larger than the sum of its proper divisors (74311912).

78100208 is a wasteful number, since it uses less digits than its factorization.

78100208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35264 (or 35258 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 78100208 is about 8837.4322062463. The cubic root of 78100208 is about 427.4487619131.

The spelling of 78100208 in words is "seventy-eight million, one hundred thousand, two hundred eight".