51689528 has 16 divisors (see below), whose sum is σ = 105728760. Its totient is φ = 23495200.

The previous prime is 51689527. The next prime is 51689531. The reversal of 51689528 is 82598615.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51689527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293603 + ... + 293778.

Almost surely, 2^51689528 is an apocalyptic number.

It is an amenable number.

51689528 is an abundant number, since it is smaller than the sum of its proper divisors (54039232).

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

51689528 is a wasteful number, since it uses less digits than its factorization.

51689528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587398 (or 587394 counting only the distinct ones).

The product of its digits is 172800, while the sum is 44.

The square root of 51689528 is about 7189.5429618300. The cubic root of 51689528 is about 372.5067860572.

The spelling of 51689528 in words is "fifty-one million, six hundred eighty-nine thousand, five hundred twenty-eight".