61188894 has 48 divisors (see below), whose sum is σ = 144144000. Its totient is φ = 18646848.

The previous prime is 61188893. The next prime is 61188923. The reversal of 61188894 is 49888116.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61188893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24307 + ... + 26705.

It is an arithmetic number, because the mean of its divisors is an integer number (3003000).

Almost surely, 2^61188894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61188894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72072000).

61188894 is an abundant number, since it is smaller than the sum of its proper divisors (82955106).

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

61188894 is a wasteful number, since it uses less digits than its factorization.

61188894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529 (or 2526 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 61188894 is about 7822.3330279399. Note that the first 3 decimals coincide. The cubic root of 61188894 is about 394.0556278659.

The spelling of 61188894 in words is "sixty-one million, one hundred eighty-eight thousand, eight hundred ninety-four".