61886418 has 24 divisors (see below), whose sum is σ = 136049424. Its totient is φ = 18753240.

The previous prime is 61886411. The next prime is 61886423. The reversal of 61886418 is 81468816.

It is a self number, because there is not a number n which added to its sum of digits gives 61886418.

It is not an unprimeable number, because it can be changed into a prime (61886411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41896 + ... + 43347.

It is an arithmetic number, because the mean of its divisors is an integer number (5668726).

Almost surely, 2^61886418 is an apocalyptic number.

61886418 is an abundant number, since it is smaller than the sum of its proper divisors (74163006).

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

61886418 is a wasteful number, since it uses less digits than its factorization.

61886418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85270 (or 85259 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 61886418 is about 7866.7921035197. The cubic root of 61886418 is about 395.5473222358.

The spelling of 61886418 in words is "sixty-one million, eight hundred eighty-six thousand, four hundred eighteen".