298423440 has 560 divisors, whose sum is σ = 1288096128. Its totient is φ = 62705664.

The previous prime is 298423439. The next prime is 298423441. The reversal of 298423440 is 44324892.

It is an interprime number because it is at equal distance from previous prime (298423439) and next prime (298423441).

It is a tau number, because it is divible by the number of its divisors (560).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 298423395 and 298423404.

It is not an unprimeable number, because it can be changed into a prime (298423441) by changing a digit.

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 111 ways as a sum of consecutive naturals, for example, 6940059 + ... + 6940101.

Almost surely, 2^298423440 is an apocalyptic number.

298423440 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 298423440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (644048064).

298423440 is an abundant number, since it is smaller than the sum of its proper divisors (989672688).

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

298423440 is a wasteful number, since it uses less digits than its factorization.

298423440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 298423440 is about 17274.9367582055. The cubic root of 298423440 is about 668.2582218490.

The spelling of 298423440 in words is "two hundred ninety-eight million, four hundred twenty-three thousand, four hundred forty".