61386886 has 16 divisors (see below), whose sum is σ = 102788928. Its totient is φ = 27253800.

The previous prime is 61386877. The next prime is 61386887. The reversal of 61386886 is 68868316.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61386887) 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 7 ways as a sum of consecutive naturals, for example, 31500 + ... + 33391.

It is an arithmetic number, because the mean of its divisors is an integer number (6424308).

Almost surely, 2^61386886 is an apocalyptic number.

61386886 is a deficient number, since it is larger than the sum of its proper divisors (41402042).

61386886 is a wasteful number, since it uses less digits than its factorization.

61386886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64947.

The product of its digits is 331776, while the sum is 46.

The square root of 61386886 is about 7834.9783662752. The cubic root of 61386886 is about 394.4801921770.

The spelling of 61386886 in words is "sixty-one million, three hundred eighty-six thousand, eight hundred eighty-six".