524128840 has 32 divisors (see below), whose sum is σ = 1184372280. Its totient is φ = 208748032.

The previous prime is 524128837. The next prime is 524128841. The reversal of 524128840 is 48821425.

It can be written as a sum of positive squares in 4 ways, for example, as 356529924 + 167598916 = 18882^2 + 12946^2 .

It is a super-2 number, since 2×524128840² = 549422081839491200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 524128796 and 524128805.

It is not an unprimeable number, because it can be changed into a prime (524128841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18799 + ... + 37438.

Almost surely, 2^524128840 is an apocalyptic number.

It is an amenable number.

524128840 is an abundant number, since it is smaller than the sum of its proper divisors (660243440).

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

524128840 is a wasteful number, since it uses less digits than its factorization.

524128840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56481 (or 56477 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The square root of 524128840 is about 22893.8603123195. The cubic root of 524128840 is about 806.2678682016.

The spelling of 524128840 in words is "five hundred twenty-four million, one hundred twenty-eight thousand, eight hundred forty".