61908688 has 40 divisors (see below), whose sum is σ = 129366720. Its totient is φ = 28604160.

The previous prime is 61908677. The next prime is 61908689. The reversal of 61908688 is 88680916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61908689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9981 + ... + 14947.

It is an arithmetic number, because the mean of its divisors is an integer number (3234168).

Almost surely, 2^61908688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61908688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64683360).

61908688 is an abundant number, since it is smaller than the sum of its proper divisors (67458032).

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

61908688 is a wasteful number, since it uses less digits than its factorization.

61908688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035 (or 5029 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 61908688 is about 7868.2074197367. The cubic root of 61908688 is about 395.5947628145.

It can be divided in two parts, 6190 and 8688, that added together give a triangular number (14878 = T₁₇₂).

The spelling of 61908688 in words is "sixty-one million, nine hundred eight thousand, six hundred eighty-eight".