297920385 has 48 divisors (see below), whose sum is σ = 609223680. Its totient is φ = 131794560.

The previous prime is 297920353. The next prime is 297920387. The reversal of 297920385 is 583029792.

It is not a de Polignac number, because 297920385 - 2⁵ = 297920353 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 297920385.

It is not an unprimeable number, because it can be changed into a prime (297920387) 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 47 ways as a sum of consecutive naturals, for example, 5490 + ... + 25019.

It is an arithmetic number, because the mean of its divisors is an integer number (12692160).

Almost surely, 2^297920385 is an apocalyptic number.

It is an amenable number.

297920385 is an abundant number, since it is smaller than the sum of its proper divisors (311303295).

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

297920385 is a wasteful number, since it uses less digits than its factorization.

297920385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30558 (or 30555 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 297920385 is about 17260.3703610322. The cubic root of 297920385 is about 667.8825144178.

The spelling of 297920385 in words is "two hundred ninety-seven million, nine hundred twenty thousand, three hundred eighty-five".