61220760 has 64 divisors (see below), whose sum is σ = 186796800. Its totient is φ = 16046976.

The previous prime is 61220729. The next prime is 61220771. The reversal of 61220760 is 6702216.

It is a happy number.

61220760 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 61220760.

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 15 ways as a sum of consecutive naturals, for example, 2757 + ... + 11403.

It is an arithmetic number, because the mean of its divisors is an integer number (2918700).

Almost surely, 2^61220760 is an apocalyptic number.

61220760 is a gapful number since it is divisible by the number (60) 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 61220760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93398400).

61220760 is an abundant number, since it is smaller than the sum of its proper divisors (125576040).

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

61220760 is a wasteful number, since it uses less digits than its factorization.

61220760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8720 (or 8716 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 61220760 is about 7824.3696231709. The cubic root of 61220760 is about 394.1240215271.

Adding to 61220760 its reverse (6702216), we get a palindrome (67922976).

The spelling of 61220760 in words is "sixty-one million, two hundred twenty thousand, seven hundred sixty".