528639249 has 16 divisors (see below), whose sum is σ = 729169920. Its totient is φ = 340316880.

The previous prime is 528639211. The next prime is 528639269. The reversal of 528639249 is 942936825.

It is a happy number.

It is not a de Polignac number, because 528639249 - 2⁷ = 528639121 is a prime.

It is a super-3 number, since 3×528639249³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 528639198 and 528639207.

It is not an unprimeable number, because it can be changed into a prime (528639269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38614 + ... + 50480.

It is an arithmetic number, because the mean of its divisors is an integer number (45573120).

Almost surely, 2^528639249 is an apocalyptic number.

It is an amenable number.

528639249 is a deficient number, since it is larger than the sum of its proper divisors (200530671).

528639249 is a wasteful number, since it uses less digits than its factorization.

528639249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12380.

The product of its digits is 933120, while the sum is 48.

The square root of 528639249 is about 22992.1562494691. The cubic root of 528639249 is about 808.5740542237.

The spelling of 528639249 in words is "five hundred twenty-eight million, six hundred thirty-nine thousand, two hundred forty-nine".