288639025 has 6 divisors (see below), whose sum is σ = 357912422. Its totient is φ = 230911200.

The previous prime is 288639017. The next prime is 288639031. The reversal of 288639025 is 520936882.

It can be written as a sum of positive squares in 3 ways, for example, as 16916769 + 271722256 = 4113^2 + 16484^2 .

It is not a de Polignac number, because 288639025 - 2³ = 288639017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5772756 + ... + 5772805.

Almost surely, 2^288639025 is an apocalyptic number.

288639025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

288639025 is a deficient number, since it is larger than the sum of its proper divisors (69273397).

288639025 is a wasteful number, since it uses less digits than its factorization.

288639025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11545571 (or 11545566 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 288639025 is about 16989.3797709039. The cubic root of 288639025 is about 660.8735181560.

The spelling of 288639025 in words is "two hundred eighty-eight million, six hundred thirty-nine thousand, twenty-five".