528027381 has 36 divisors (see below), whose sum is σ = 890596044. Its totient is φ = 300585600.

The previous prime is 528027377. The next prime is 528027431. The reversal of 528027381 is 183720825.

It can be written as a sum of positive squares in 2 ways, for example, as 449864100 + 78163281 = 21210^2 + 8841^2 .

It is not a de Polignac number, because 528027381 - 2² = 528027377 is a prime.

It is a super-2 number, since 2×528027381² = 557625830171438322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528027301) 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 35 ways as a sum of consecutive naturals, for example, 121791 + ... + 126051.

It is an arithmetic number, because the mean of its divisors is an integer number (24738779).

Almost surely, 2^528027381 is an apocalyptic number.

It is an amenable number.

528027381 is a deficient number, since it is larger than the sum of its proper divisors (362568663).

528027381 is a wasteful number, since it uses less digits than its factorization.

528027381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4562 (or 4552 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 528027381 is about 22978.8463809653. The cubic root of 528027381 is about 808.2619752457.

The spelling of 528027381 in words is "five hundred twenty-eight million, twenty-seven thousand, three hundred eighty-one".