2281288 has 8 divisors (see below), whose sum is σ = 4277430. Its totient is φ = 1140640.

The previous prime is 2281277. The next prime is 2281291. The reversal of 2281288 is 8821822.

It can be written as a sum of positive squares in only one way, i.e., 2067844 + 213444 = 1438^2 + 462^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142573 + ... + 142588.

2^2281288 is an apocalyptic number.

It is an amenable number.

2281288 is a deficient number, since it is larger than the sum of its proper divisors (1996142).

2281288 is a wasteful number, since it uses less digits than its factorization.

2281288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285167 (or 285163 counting only the distinct ones).

The product of its digits is 4096, while the sum is 31.

The square root of 2281288 is about 1510.3933262564. The cubic root of 2281288 is about 131.6416666380.

The spelling of 2281288 in words is "two million, two hundred eighty-one thousand, two hundred eighty-eight".