297640896 has 168 divisors, whose sum is σ = 970489296. Its totient is φ = 79994880.

The previous prime is 297640877. The next prime is 297640897. The reversal of 297640896 is 698046792.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (297640897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159006 + ... + 160866.

It is an arithmetic number, because the mean of its divisors is an integer number (5776722).

Almost surely, 2^297640896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 297640896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485244648).

297640896 is an abundant number, since it is smaller than the sum of its proper divisors (672848400).

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

297640896 is a wasteful number, since it uses less digits than its factorization.

297640896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907 (or 1890 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 297640896 is about 17252.2721981773. The cubic root of 297640896 is about 667.6735948223.

The spelling of 297640896 in words is "two hundred ninety-seven million, six hundred forty thousand, eight hundred ninety-six".