298978752392640 has 168 divisors, whose sum is σ = 1029633494226480. Its totient is φ = 79629115797504.

The previous prime is 298978752392599. The next prime is 298978752392647. The reversal of 298978752392640 is 46293257879892.

298978752392640 is a `hidden beast` number, since 2 + 9 + 8 + 9 + 7 + 87 + 523 + 9 + 2 + 6 + 4 + 0 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 298978752392640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (298978752392647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61830814 + ... + 66490653.

Almost surely, 2^{298978752392640} is an apocalyptic number.

298978752392640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

298978752392640 is an abundant number, since it is smaller than the sum of its proper divisors (730654741833840).

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

298978752392640 is a wasteful number, since it uses less digits than its factorization.

298978752392640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128322299 (or 128322286 counting only the distinct ones).

The product of its (nonzero) digits is 6584094720, while the sum is 81.

The spelling of 298978752392640 in words is "two hundred ninety-eight trillion, nine hundred seventy-eight billion, seven hundred fifty-two million, three hundred ninety-two thousand, six hundred forty".