531628782 has 8 divisors (see below), whose sum is σ = 1063257576. Its totient is φ = 177209592.

The previous prime is 531628733. The next prime is 531628789. The reversal of 531628782 is 287826135.

It is a sphenic number, since it is the product of 3 distinct primes.

531628782 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531628789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44302393 + ... + 44302404.

It is an arithmetic number, because the mean of its divisors is an integer number (132907197).

Almost surely, 2^531628782 is an apocalyptic number.

531628782 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

531628782 is a wasteful number, since it uses less digits than its factorization.

531628782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88604802.

The product of its digits is 161280, while the sum is 42.

The square root of 531628782 is about 23057.0766143499. The cubic root of 531628782 is about 810.0953919052.

The spelling of 531628782 in words is "five hundred thirty-one million, six hundred twenty-eight thousand, seven hundred eighty-two".