531769728 has 64 divisors (see below), whose sum is σ = 1614309120. Its totient is φ = 151933440.

The previous prime is 531769727. The next prime is 531769769. The reversal of 531769728 is 827967135.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531769727) 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 7 ways as a sum of consecutive naturals, for example, 96228 + ... + 101603.

It is an arithmetic number, because the mean of its divisors is an integer number (25223580).

Almost surely, 2^531769728 is an apocalyptic number.

It is an amenable number.

531769728 is an abundant number, since it is smaller than the sum of its proper divisors (1082539392).

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

531769728 is a wasteful number, since it uses less digits than its factorization.

531769728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197855 (or 197843 counting only the distinct ones).

The product of its digits is 635040, while the sum is 48.

The square root of 531769728 is about 23060.1328703891. The cubic root of 531769728 is about 810.1669767027.

The spelling of 531769728 in words is "five hundred thirty-one million, seven hundred sixty-nine thousand, seven hundred twenty-eight".