61133860 has 48 divisors (see below), whose sum is σ = 133604352. Its totient is φ = 23472000.

The previous prime is 61133851. The next prime is 61133861. The reversal of 61133860 is 6833116.

It is not an unprimeable number, because it can be changed into a prime (61133861) 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 15 ways as a sum of consecutive naturals, for example, 93294 + ... + 93946.

It is an arithmetic number, because the mean of its divisors is an integer number (2783424).

Almost surely, 2^61133860 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 61133860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66802176).

61133860 is an abundant number, since it is smaller than the sum of its proper divisors (72470492).

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

61133860 is a wasteful number, since it uses less digits than its factorization.

61133860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 61133860 is about 7818.8144881433. The cubic root of 61133860 is about 393.9374530309.

Adding to 61133860 its reverse (6833116), we get a palindrome (67966976).

The spelling of 61133860 in words is "sixty-one million, one hundred thirty-three thousand, eight hundred sixty".