298338640 has 20 divisors (see below), whose sum is σ = 693637524. Its totient is φ = 119335424.

The previous prime is 298338629. The next prime is 298338647. The reversal of 298338640 is 46833892.

It can be written as a sum of positive squares in 2 ways, for example, as 37063744 + 261274896 = 6088^2 + 16164^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298338647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1864537 + ... + 1864696.

Almost surely, 2^298338640 is an apocalyptic number.

298338640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

298338640 is an abundant number, since it is smaller than the sum of its proper divisors (395298884).

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

298338640 is a wasteful number, since it uses less digits than its factorization.

298338640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729246 (or 3729240 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 298338640 is about 17272.4821609403. The cubic root of 298338640 is about 668.1949184372.

The spelling of 298338640 in words is "two hundred ninety-eight million, three hundred thirty-eight thousand, six hundred forty".