288407881 has 2 divisors, whose sum is σ = 288407882. Its totient is φ = 288407880.

The previous prime is 288407863. The next prime is 288407887. The reversal of 288407881 is 188704882.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167055625 + 121352256 = 12925^2 + 11016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-288407881 is a prime.

It is a super-2 number, since 2×288407881² = 166358211645820322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (288407887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144203940 + 144203941.

It is an arithmetic number, because the mean of its divisors is an integer number (144203941).

Almost surely, 2^288407881 is an apocalyptic number.

It is an amenable number.

288407881 is a deficient number, since it is larger than the sum of its proper divisors (1).

288407881 is an equidigital number, since it uses as much as digits as its factorization.

288407881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 229376, while the sum is 46.

The square root of 288407881 is about 16982.5758058076. The cubic root of 288407881 is about 660.6970604474.

The spelling of 288407881 in words is "two hundred eighty-eight million, four hundred seven thousand, eight hundred eighty-one".