288720913 has 16 divisors (see below), whose sum is σ = 316535296. Its totient is φ = 261740160.

The previous prime is 288720907. The next prime is 288720947. The reversal of 288720913 is 319027882.

It is a cyclic number.

It is not a de Polignac number, because 288720913 - 2²¹ = 286623761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (288720973) 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, 290848 + ... + 291838.

It is an arithmetic number, because the mean of its divisors is an integer number (19783456).

Almost surely, 2^288720913 is an apocalyptic number.

It is an amenable number.

288720913 is a deficient number, since it is larger than the sum of its proper divisors (27814383).

288720913 is a wasteful number, since it uses less digits than its factorization.

288720913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 288720913 is about 16991.7895761453. The cubic root of 288720913 is about 660.9360096984.

The spelling of 288720913 in words is "two hundred eighty-eight million, seven hundred twenty thousand, nine hundred thirteen".