208769140 has 24 divisors (see below), whose sum is σ = 445848480. Its totient is φ = 82091808.

The previous prime is 208769111. The next prime is 208769147. The reversal of 208769140 is 41967802.

It is a self number, because there is not a number n which added to its sum of digits gives 208769140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208769147) 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, 87282 + ... + 89641.

It is an arithmetic number, because the mean of its divisors is an integer number (18577020).

Almost surely, 2^208769140 is an apocalyptic number.

208769140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208769140 is an abundant number, since it is smaller than the sum of its proper divisors (237079340).

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

208769140 is a wasteful number, since it uses less digits than its factorization.

208769140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176991 (or 176989 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 208769140 is about 14448.8456286307. The cubic root of 208769140 is about 593.2286275981.

The spelling of 208769140 in words is "two hundred eight million, seven hundred sixty-nine thousand, one hundred forty".