2528721284 has 6 divisors (see below), whose sum is σ = 4425262254. Its totient is φ = 1264360640.

The previous prime is 2528721281. The next prime is 2528721301. The reversal of 2528721284 is 4821278252.

It can be written as a sum of positive squares in only one way, i.e., 1542761284 + 985960000 = 39278^2 + 31400^2 .

It is not an unprimeable number, because it can be changed into a prime (2528721281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316090157 + ... + 316090164.

It is an arithmetic number, because the mean of its divisors is an integer number (737543709).

Almost surely, 2^2528721284 is an apocalyptic number.

It is an amenable number.

2528721284 is a deficient number, since it is larger than the sum of its proper divisors (1896540970).

2528721284 is a wasteful number, since it uses less digits than its factorization.

2528721284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632180325 (or 632180323 counting only the distinct ones).

The product of its digits is 143360, while the sum is 41.

The square root of 2528721284 is about 50286.3926325999. The cubic root of 2528721284 is about 1362.3864680420.

The spelling of 2528721284 in words is "two billion, five hundred twenty-eight million, seven hundred twenty-one thousand, two hundred eighty-four".