297742720 has 64 divisors (see below), whose sum is σ = 776517840. Its totient is φ = 108267520.

The previous prime is 297742703. The next prime is 297742721. The reversal of 297742720 is 27247792.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (297742721) 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 7 ways as a sum of consecutive naturals, for example, 14107 + ... + 28186.

Almost surely, 2^297742720 is an apocalyptic number.

297742720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

297742720 is an abundant number, since it is smaller than the sum of its proper divisors (478775120).

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

297742720 is a wasteful number, since it uses less digits than its factorization.

297742720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42323 (or 42311 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 297742720 is about 17255.2229774060. Note that the first 3 decimals coincide. The cubic root of 297742720 is about 667.7497239719.

The spelling of 297742720 in words is "two hundred ninety-seven million, seven hundred forty-two thousand, seven hundred twenty".