290445680 has 80 divisors (see below), whose sum is σ = 817179840. Its totient is φ = 93720576.

The previous prime is 290445667. The next prime is 290445689. The reversal of 290445680 is 86544092.

290445680 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290445689) 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, 5735 + ... + 24774.

It is an arithmetic number, because the mean of its divisors is an integer number (10214748).

Almost surely, 2^290445680 is an apocalyptic number.

290445680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290445680 is an abundant number, since it is smaller than the sum of its proper divisors (526734160).

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

290445680 is a wasteful number, since it uses less digits than its factorization.

290445680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30546 (or 30540 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 290445680 is about 17042.4669575740. The cubic root of 290445680 is about 662.2495020684.

It can be divided in two parts, 2904 and 45680, that added together give a palindrome (48584).

The spelling of 290445680 in words is "two hundred ninety million, four hundred forty-five thousand, six hundred eighty".