297139890528 has 144 divisors (see below), whose sum is σ = 911375193456. Its totient is φ = 91288581120.

The previous prime is 297139890527. The next prime is 297139890563. The reversal of 297139890528 is 825098931792.

297139890528 is a `hidden beast` number, since 2 + 9 + 7 + 13 + 9 + 8 + 90 + 528 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×297139890528² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (297139890527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2414751 + ... + 2534817.

It is an arithmetic number, because the mean of its divisors is an integer number (6328994399).

Almost surely, 2^297139890528 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 297139890528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455687596728).

297139890528 is an abundant number, since it is smaller than the sum of its proper divisors (614235302928).

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

297139890528 is a wasteful number, since it uses less digits than its factorization.

297139890528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120757 (or 120746 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 297139890528 in words is "two hundred ninety-seven billion, one hundred thirty-nine million, eight hundred ninety thousand, five hundred twenty-eight".