2897520444 has 384 divisors, whose sum is σ = 9934848000. Its totient is φ = 708984576.

The previous prime is 2897520433. The next prime is 2897520467. The reversal of 2897520444 is 4440257982.

2897520444 is a `hidden beast` number, since 2 + 89 + 7 + 520 + 4 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2897520444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11017057 + ... + 11017319.

It is an arithmetic number, because the mean of its divisors is an integer number (25872000).

Almost surely, 2^2897520444 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 2897520444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4967424000).

2897520444 is an abundant number, since it is smaller than the sum of its proper divisors (7037327556).

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

2897520444 is a wasteful number, since it uses less digits than its factorization.

2897520444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 2897520444 is about 53828.6210486577. The cubic root of 2897520444 is about 1425.6365997757.

The spelling of 2897520444 in words is "two billion, eight hundred ninety-seven million, five hundred twenty thousand, four hundred forty-four".