208140387 has 24 divisors (see below), whose sum is σ = 347666256. Its totient is φ = 109787328.

The previous prime is 208140371. The next prime is 208140389. The reversal of 208140387 is 783041802.

It is not a de Polignac number, because 208140387 - 2⁴ = 208140371 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (208140389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52548 + ... + 56369.

It is an arithmetic number, because the mean of its divisors is an integer number (14486094).

Almost surely, 2^208140387 is an apocalyptic number.

208140387 is a deficient number, since it is larger than the sum of its proper divisors (139525869).

208140387 is a wasteful number, since it uses less digits than its factorization.

208140387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108947 (or 108940 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 208140387 is about 14427.0713244234. The cubic root of 208140387 is about 592.6324836823.

The spelling of 208140387 in words is "two hundred eight million, one hundred forty thousand, three hundred eighty-seven".