288972640 has 96 divisors (see below), whose sum is σ = 751869216. Its totient is φ = 104079360.

The previous prime is 288972637. The next prime is 288972641. The reversal of 288972640 is 46279882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288972641) 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, 198154 + ... + 199606.

It is an arithmetic number, because the mean of its divisors is an integer number (7831971).

Almost surely, 2^288972640 is an apocalyptic number.

288972640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 288972640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375934608).

288972640 is an abundant number, since it is smaller than the sum of its proper divisors (462896576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

288972640 is a wasteful number, since it uses less digits than its factorization.

288972640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592 (or 1584 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 288972640 is about 16999.1952750711. The cubic root of 288972640 is about 661.1280372497.

The spelling of 288972640 in words is "two hundred eighty-eight million, nine hundred seventy-two thousand, six hundred forty".