288445990 has 64 divisors (see below), whose sum is σ = 625895424. Its totient is φ = 93570048.

The previous prime is 288445961. The next prime is 288445991. The reversal of 288445990 is 99544882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288445991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155247 + ... + 157093.

It is an arithmetic number, because the mean of its divisors is an integer number (9779616).

Almost surely, 2^288445990 is an apocalyptic number.

288445990 is an abundant number, since it is smaller than the sum of its proper divisors (337449434).

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

288445990 is a wasteful number, since it uses less digits than its factorization.

288445990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981.

The product of its (nonzero) digits is 829440, while the sum is 49.

The square root of 288445990 is about 16983.6977716868. The cubic root of 288445990 is about 660.7261597393.

The spelling of 288445990 in words is "two hundred eighty-eight million, four hundred forty-five thousand, nine hundred ninety".