298280640 has 336 divisors, whose sum is σ = 1169590752. Its totient is φ = 63995904.

The previous prime is 298280603. The next prime is 298280651. The reversal of 298280640 is 46082892.

It is a tau number, because it is divible by the number of its divisors (336).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 799494 + ... + 799866.

Almost surely, 2^298280640 is an apocalyptic number.

298280640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 298280640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584795376).

298280640 is an abundant number, since it is smaller than the sum of its proper divisors (871310112).

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

298280640 is a wasteful number, since it uses less digits than its factorization.

298280640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 298280640 is about 17270.8031081360. The cubic root of 298280640 is about 668.1516143840.

The spelling of 298280640 in words is "two hundred ninety-eight million, two hundred eighty thousand, six hundred forty".