297899940 has 96 divisors (see below), whose sum is σ = 901192320. Its totient is φ = 73092096.

The previous prime is 297899929. The next prime is 297899947. The reversal of 297899940 is 49998792.

It is not an unprimeable number, because it can be changed into a prime (297899947) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 480951 + ... + 481569.

It is an arithmetic number, because the mean of its divisors is an integer number (9387420).

Almost surely, 2^297899940 is an apocalyptic number.

297899940 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 297899940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (450596160).

297899940 is an abundant number, since it is smaller than the sum of its proper divisors (603292380).

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

297899940 is a wasteful number, since it uses less digits than its factorization.

297899940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261 (or 1259 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 57.

The square root of 297899940 is about 17259.7780982259. The cubic root of 297899940 is about 667.8672360962.

The spelling of 297899940 in words is "two hundred ninety-seven million, eight hundred ninety-nine thousand, nine hundred forty".