61688732 has 12 divisors (see below), whose sum is σ = 123377520. Its totient is φ = 26438016.

The previous prime is 61688717. The next prime is 61688743. The reversal of 61688732 is 23788616.

It is a happy number.

61688732 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 61688732.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1101557 + ... + 1101612.

It is an arithmetic number, because the mean of its divisors is an integer number (10281460).

Almost surely, 2^61688732 is an apocalyptic number.

It is an amenable number.

61688732 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.

61688732 is a wasteful number, since it uses less digits than its factorization.

61688732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203180 (or 2203178 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 61688732 is about 7854.2174657950. The cubic root of 61688732 is about 395.1257026623.

The spelling of 61688732 in words is "sixty-one million, six hundred eighty-eight thousand, seven hundred thirty-two".