298309840 has 20 divisors (see below), whose sum is σ = 693570564. Its totient is φ = 119323904.

The previous prime is 298309813. The next prime is 298309853. The reversal of 298309840 is 48903892.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 178275904 + 120033936 = 13352^2 + 10956^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1864357 + ... + 1864516.

Almost surely, 2^298309840 is an apocalyptic number.

298309840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

298309840 is an abundant number, since it is smaller than the sum of its proper divisors (395260724).

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

298309840 is a wasteful number, since it uses less digits than its factorization.

298309840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728886 (or 3728880 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 298309840 is about 17271.6484447779. The cubic root of 298309840 is about 668.1734164366.

The spelling of 298309840 in words is "two hundred ninety-eight million, three hundred nine thousand, eight hundred forty".