61220368 has 40 divisors (see below), whose sum is σ = 130393440. Its totient is φ = 27613440.

The previous prime is 61220333. The next prime is 61220377. The reversal of 61220368 is 86302216.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22843 + ... + 25381.

It is an arithmetic number, because the mean of its divisors is an integer number (3259836).

Almost surely, 2^61220368 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 61220368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65196720).

61220368 is an abundant number, since it is smaller than the sum of its proper divisors (69173072).

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

61220368 is a wasteful number, since it uses less digits than its factorization.

61220368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695 (or 2689 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 61220368 is about 7824.3445731895. The cubic root of 61220368 is about 394.1231803258.

The spelling of 61220368 in words is "sixty-one million, two hundred twenty thousand, three hundred sixty-eight".