297720864 has 324 divisors, whose sum is σ = 1060544394. Its totient is φ = 78962688.

The previous prime is 297720859. The next prime is 297720877. The reversal of 297720864 is 468027792.

It can be written as a sum of positive squares in 3 ways, for example, as 296528400 + 1192464 = 17220^2 + 1092^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 4078332 + ... + 4078404.

Almost surely, 2^297720864 is an apocalyptic number.

297720864 is a gapful number since it is divisible by the number (24) 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 297720864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (530272197).

297720864 is an abundant number, since it is smaller than the sum of its proper divisors (762823530).

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

297720864 is a wasteful number, since it uses less digits than its factorization.

297720864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 297720864 is about 17254.5896502930. The cubic root of 297720864 is about 667.7333847030.

The spelling of 297720864 in words is "two hundred ninety-seven million, seven hundred twenty thousand, eight hundred sixty-four".