288672261 has 16 divisors (see below), whose sum is σ = 403716864. Its totient is φ = 183259584.

The previous prime is 288672253. The next prime is 288672269. The reversal of 288672261 is 162276882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (288672253) and next prime (288672269).

It is not a de Polignac number, because 288672261 - 2³ = 288672253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288672269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22450 + ... + 32883.

It is an arithmetic number, because the mean of its divisors is an integer number (25232304).

Almost surely, 2^288672261 is an apocalyptic number.

It is an amenable number.

288672261 is a deficient number, since it is larger than the sum of its proper divisors (115044603).

288672261 is a wasteful number, since it uses less digits than its factorization.

288672261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55420.

The product of its digits is 129024, while the sum is 42.

The square root of 288672261 is about 16990.3578832231. The cubic root of 288672261 is about 660.8988831128.

The spelling of 288672261 in words is "two hundred eighty-eight million, six hundred seventy-two thousand, two hundred sixty-one".