61868736 has 84 divisors (see below), whose sum is σ = 182191152. Its totient is φ = 20058624.

The previous prime is 61868711. The next prime is 61868747. The reversal of 61868736 is 63786816.

It is a junction number, because it is equal to n+sod(n) for n = 61868691 and 61868700.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19861 + ... + 22763.

Almost surely, 2^61868736 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 61868736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91095576).

61868736 is an abundant number, since it is smaller than the sum of its proper divisors (120322416).

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

61868736 is a wasteful number, since it uses less digits than its factorization.

61868736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2958 (or 2945 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 61868736 is about 7865.6681852211. The cubic root of 61868736 is about 395.5096471196.

The spelling of 61868736 in words is "sixty-one million, eight hundred sixty-eight thousand, seven hundred thirty-six".