288261355 has 4 divisors (see below), whose sum is σ = 345913632. Its totient is φ = 230609080.

The previous prime is 288261341. The next prime is 288261361. The reversal of 288261355 is 553162882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553162882 = 2 ⋅276581441.

It is not a de Polignac number, because 288261355 - 2¹⁵ = 288228587 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 28826131 + ... + 28826140.

It is an arithmetic number, because the mean of its divisors is an integer number (86478408).

Almost surely, 2^288261355 is an apocalyptic number.

288261355 is a deficient number, since it is larger than the sum of its proper divisors (57652277).

288261355 is an equidigital number, since it uses as much as digits as its factorization.

288261355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57652276.

The product of its digits is 115200, while the sum is 40.

The square root of 288261355 is about 16978.2612478428. The cubic root of 288261355 is about 660.5851521592.

The spelling of 288261355 in words is "two hundred eighty-eight million, two hundred sixty-one thousand, three hundred fifty-five".