297997380 has 60 divisors (see below), whose sum is σ = 934833900. Its totient is φ = 79465536.

The previous prime is 297997373. The next prime is 297997397. The reversal of 297997380 is 83799792.

297997380 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 2 ways, for example, as 104898564 + 193098816 = 10242^2 + 13896^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 90355 + ... + 93594.

It is an arithmetic number, because the mean of its divisors is an integer number (15580565).

Almost surely, 2^297997380 is an apocalyptic number.

297997380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

297997380 is an abundant number, since it is smaller than the sum of its proper divisors (636836520).

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

297997380 is a wasteful number, since it uses less digits than its factorization.

297997380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183970 (or 183959 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The square root of 297997380 is about 17262.6006152028. The cubic root of 297997380 is about 667.9400456548.

The spelling of 297997380 in words is "two hundred ninety-seven million, nine hundred ninety-seven thousand, three hundred eighty".