297681680 has 40 divisors (see below), whose sum is σ = 695175000. Its totient is φ = 118545408.

The previous prime is 297681673. The next prime is 297681697. The reversal of 297681680 is 86186792.

297681680 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 103469584 + 194212096 = 10172^2 + 13936^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×297681680² = 177228765215244800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10196 + ... + 26444.

It is an arithmetic number, because the mean of its divisors is an integer number (17379375).

Almost surely, 2^297681680 is an apocalyptic number.

297681680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

297681680 is an abundant number, since it is smaller than the sum of its proper divisors (397493320).

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

297681680 is a wasteful number, since it uses less digits than its factorization.

297681680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16491 (or 16485 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 297681680 is about 17253.4541469237. The cubic root of 297681680 is about 667.7040892387.

The spelling of 297681680 in words is "two hundred ninety-seven million, six hundred eighty-one thousand, six hundred eighty".