207661284 has 18 divisors (see below), whose sum is σ = 524921670. Its totient is φ = 69220416.

The previous prime is 207661271. The next prime is 207661303. The reversal of 207661284 is 482166702.

207661284 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 135070884 + 72590400 = 11622^2 + 8520^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5768369 = 207661284 / (2 + 0 + 7 + 6 + 6 + 1 + 2 + 8 + 4).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2884149 + ... + 2884220.

It is an arithmetic number, because the mean of its divisors is an integer number (29162315).

Almost surely, 2^207661284 is an apocalyptic number.

It is an amenable number.

207661284 is an abundant number, since it is smaller than the sum of its proper divisors (317260386).

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

207661284 is a wasteful number, since it uses less digits than its factorization.

207661284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5768379 (or 5768374 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 207661284 is about 14410.4574528361. The cubic root of 207661284 is about 592.1774220162.

The spelling of 207661284 in words is "two hundred seven million, six hundred sixty-one thousand, two hundred eighty-four".