288028813 has 4 divisors (see below), whose sum is σ = 295053948. Its totient is φ = 281003680.

The previous prime is 288028799. The next prime is 288028837. The reversal of 288028813 is 318820882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318820882 = 2 ⋅159410441.

It can be written as a sum of positive squares in 2 ways, for example, as 147914244 + 140114569 = 12162^2 + 11837^2 .

It is a cyclic number.

It is not a de Polignac number, because 288028813 - 2¹⁷ = 287897741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288028883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3512506 + ... + 3512587.

It is an arithmetic number, because the mean of its divisors is an integer number (73763487).

Almost surely, 2^288028813 is an apocalyptic number.

It is an amenable number.

288028813 is a deficient number, since it is larger than the sum of its proper divisors (7025135).

288028813 is an equidigital number, since it uses as much as digits as its factorization.

288028813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7025134.

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 288028813 is about 16971.4116383994. The cubic root of 288028813 is about 660.4074718292.

The spelling of 288028813 in words is "two hundred eighty-eight million, twenty-eight thousand, eight hundred thirteen".