529728381 has 48 divisors (see below), whose sum is σ = 997161984. Its totient is φ = 262973952.

The previous prime is 529728343. The next prime is 529728383. The reversal of 529728381 is 183827925.

It is a happy number.

529728381 is a `hidden beast` number, since 5 + 297 + 283 + 81 = 666.

It is not a de Polignac number, because 529728381 - 2¹¹ = 529726333 is a prime.

It is a super-2 number, since 2×529728381² = 561224315273762322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (529728383) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 5101 + ... + 32946.

It is an arithmetic number, because the mean of its divisors is an integer number (20774208).

Almost surely, 2^529728381 is an apocalyptic number.

529728381 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

529728381 is a deficient number, since it is larger than the sum of its proper divisors (467433603).

529728381 is a wasteful number, since it uses less digits than its factorization.

529728381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38090 (or 38087 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 529728381 is about 23015.8289227219. The cubic root of 529728381 is about 809.1289630681.

The spelling of 529728381 in words is "five hundred twenty-nine million, seven hundred twenty-eight thousand, three hundred eighty-one".