61841988 has 96 divisors (see below), whose sum is σ = 182891520. Its totient is φ = 17902080.

The previous prime is 61841959. The next prime is 61841999. The reversal of 61841988 is 88914816.

61841988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 22573 + ... + 25163.

It is an arithmetic number, because the mean of its divisors is an integer number (1905120).

Almost surely, 2^61841988 is an apocalyptic number.

61841988 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61841988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91445760).

61841988 is an abundant number, since it is smaller than the sum of its proper divisors (121049532).

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

61841988 is a wasteful number, since it uses less digits than its factorization.

61841988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634 (or 2626 counting only the distinct ones).

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

The square root of 61841988 is about 7863.9677008492. The cubic root of 61841988 is about 395.4526413918.

The spelling of 61841988 in words is "sixty-one million, eight hundred forty-one thousand, nine hundred eighty-eight".