261079730 has 8 divisors (see below), whose sum is σ = 469943532. Its totient is φ = 104431888.

The previous prime is 261079723. The next prime is 261079747. The reversal of 261079730 is 37970162.

It can be written as a sum of positive squares in 2 ways, for example, as 260144641 + 935089 = 16129^2 + 967^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13053977 + ... + 13053996.

Almost surely, 2^261079730 is an apocalyptic number.

261079730 is a deficient number, since it is larger than the sum of its proper divisors (208863802).

261079730 is a wasteful number, since it uses less digits than its factorization.

261079730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26107980.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 261079730 is about 16157.9618145359. The cubic root of 261079730 is about 639.1327201152.

The spelling of 261079730 in words is "two hundred sixty-one million, seventy-nine thousand, seven hundred thirty".