288423790 has 32 divisors (see below), whose sum is σ = 532578816. Its totient is φ = 112402080.

The previous prime is 288423787. The next prime is 288423791. The reversal of 288423790 is 97324882.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288423791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270799 + ... + 271861.

It is an arithmetic number, because the mean of its divisors is an integer number (16643088).

Almost surely, 2^288423790 is an apocalyptic number.

288423790 is a deficient number, since it is larger than the sum of its proper divisors (244155026).

288423790 is a wasteful number, since it uses less digits than its factorization.

288423790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 288423790 is about 16983.0441911926. The cubic root of 288423790 is about 660.7092085623.

The spelling of 288423790 in words is "two hundred eighty-eight million, four hundred twenty-three thousand, seven hundred ninety".