288627989 has 16 divisors (see below), whose sum is σ = 343429632. Its totient is φ = 239847168.

The previous prime is 288627961. The next prime is 288628019. The reversal of 288627989 is 989726882.

It is a cyclic number.

It is not a de Polignac number, because 288627989 - 2¹⁶ = 288562453 is a prime.

It is a super-2 number, since 2×288627989² = 166612232068368242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288627919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23309 + ... + 33474.

It is an arithmetic number, because the mean of its divisors is an integer number (21464352).

Almost surely, 2^288627989 is an apocalyptic number.

It is an amenable number.

288627989 is a deficient number, since it is larger than the sum of its proper divisors (54801643).

288627989 is a wasteful number, since it uses less digits than its factorization.

288627989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56836.

The product of its digits is 6967296, while the sum is 59.

The square root of 288627989 is about 16989.0549766607. The cubic root of 288627989 is about 660.8650953020.

The spelling of 288627989 in words is "two hundred eighty-eight million, six hundred twenty-seven thousand, nine hundred eighty-nine".