61187238 has 80 divisors (see below), whose sum is σ = 158906880. Its totient is φ = 17235504.

The previous prime is 61187221. The next prime is 61187263. The reversal of 61187238 is 83278116.

61187238 is a `hidden beast` number, since 611 + 8 + 7 + 2 + 38 = 666.

61187238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 89245 + ... + 89927.

It is an arithmetic number, because the mean of its divisors is an integer number (1986336).

Almost surely, 2^61187238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61187238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79453440).

61187238 is an abundant number, since it is smaller than the sum of its proper divisors (97719642).

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

61187238 is a wasteful number, since it uses less digits than its factorization.

61187238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783 (or 774 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 61187238 is about 7822.2271764505. The cubic root of 61187238 is about 394.0520729615.

It can be divided in two parts, 61187 and 238, that added together give a triangular number (61425 = T₃₅₀).

The spelling of 61187238 in words is "sixty-one million, one hundred eighty-seven thousand, two hundred thirty-eight".