298736640 has 176 divisors, whose sum is σ = 1062147360. Its totient is φ = 79626240.

The previous prime is 298736587. The next prime is 298736651. The reversal of 298736640 is 46637892.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137160 + ... + 139320.

Almost surely, 2^298736640 is an apocalyptic number.

298736640 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 298736640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531073680).

298736640 is an abundant number, since it is smaller than the sum of its proper divisors (763410720).

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

298736640 is a wasteful number, since it uses less digits than its factorization.

298736640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195 (or 2171 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 298736640 is about 17283.9995371442. Note that the first 3 decimals coincide. The cubic root of 298736640 is about 668.4919225452.

The spelling of 298736640 in words is "two hundred ninety-eight million, seven hundred thirty-six thousand, six hundred forty".