61688260 has 12 divisors (see below), whose sum is σ = 129545388. Its totient is φ = 24675296.

The previous prime is 61688251. The next prime is 61688261. The reversal of 61688260 is 6288616.

61688260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 26071236 + 35617024 = 5106^2 + 5968^2 .

It is not an unprimeable number, because it can be changed into a prime (61688261) 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, 1542187 + ... + 1542226.

It is an arithmetic number, because the mean of its divisors is an integer number (10795449).

Almost surely, 2^61688260 is an apocalyptic number.

It is an amenable number.

61688260 is an abundant number, since it is smaller than the sum of its proper divisors (67857128).

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

61688260 is a wasteful number, since it uses less digits than its factorization.

61688260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084422 (or 3084420 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 61688260 is about 7854.1874181866. The cubic root of 61688260 is about 395.1246949158.

The spelling of 61688260 in words is "sixty-one million, six hundred eighty-eight thousand, two hundred sixty".