2528889438 has 16 divisors (see below), whose sum is σ = 5081751936. Its totient is φ = 838967640.

The previous prime is 2528889437. The next prime is 2528889457. The reversal of 2528889438 is 8349888252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2528889437) 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 7 ways as a sum of consecutive naturals, for example, 997506 + ... + 1000037.

It is an arithmetic number, because the mean of its divisors is an integer number (317609496).

Almost surely, 2^2528889438 is an apocalyptic number.

2528889438 is an abundant number, since it is smaller than the sum of its proper divisors (2552862498).

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

2528889438 is a wasteful number, since it uses less digits than its factorization.

2528889438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997759.

The product of its digits is 8847360, while the sum is 57.

The square root of 2528889438 is about 50288.0645680464. The cubic root of 2528889438 is about 1362.4166658680.

The spelling of 2528889438 in words is "two billion, five hundred twenty-eight million, eight hundred eighty-nine thousand, four hundred thirty-eight".