298784640 has 512 divisors, whose sum is σ = 1240842240. Its totient is φ = 59351040.

The previous prime is 298784623. The next prime is 298784677. The reversal of 298784640 is 46487892.

It is a super-2 number, since 2×298784640² = 178544522199859200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 298784640.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 6357097 + ... + 6357143.

It is an arithmetic number, because the mean of its divisors is an integer number (2423520).

Almost surely, 2^298784640 is an apocalyptic number.

298784640 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 298784640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620421120).

298784640 is an abundant number, since it is smaller than the sum of its proper divisors (942057600).

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

298784640 is a wasteful number, since it uses less digits than its factorization.

298784640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 298784640 is about 17285.3880488695. The cubic root of 298784640 is about 668.5277243068.

The spelling of 298784640 in words is "two hundred ninety-eight million, seven hundred eighty-four thousand, six hundred forty".