207138308 has 24 divisors (see below), whose sum is σ = 391843200. Its totient is φ = 95243040.

The previous prime is 207138301. The next prime is 207138331. The reversal of 207138308 is 803831702.

207138308 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×207138308² = 85812557282205728, which contains 22 as substring.

207138308 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (207138301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6743 + ... + 21441.

It is an arithmetic number, because the mean of its divisors is an integer number (16326800).

Almost surely, 2^207138308 is an apocalyptic number.

It is an amenable number.

207138308 is a deficient number, since it is larger than the sum of its proper divisors (184704892).

207138308 is a wasteful number, since it uses less digits than its factorization.

207138308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14987 (or 14985 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 207138308 is about 14392.3003025924. The cubic root of 207138308 is about 591.6798891797.

The spelling of 207138308 in words is "two hundred seven million, one hundred thirty-eight thousand, three hundred eight".