531632728 has 16 divisors (see below), whose sum is σ = 1087430760. Its totient is φ = 241651200.

The previous prime is 531632723. The next prime is 531632729. The reversal of 531632728 is 827236135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531632723) 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 3 ways as a sum of consecutive naturals, for example, 3020553 + ... + 3020728.

Almost surely, 2^531632728 is an apocalyptic number.

It is an amenable number.

531632728 is an abundant number, since it is smaller than the sum of its proper divisors (555798032).

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

531632728 is a wasteful number, since it uses less digits than its factorization.

531632728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6041298 (or 6041294 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 531632728 is about 23057.1621844493. The cubic root of 531632728 is about 810.0973962039.

The spelling of 531632728 in words is "five hundred thirty-one million, six hundred thirty-two thousand, seven hundred twenty-eight".