61384220 has 48 divisors (see below), whose sum is σ = 133122528. Its totient is φ = 23761920.

The previous prime is 61384187. The next prime is 61384241. The reversal of 61384220 is 2248316.

It is a self number, because there is not a number n which added to its sum of digits gives 61384220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117560 + ... + 118080.

It is an arithmetic number, because the mean of its divisors is an integer number (2773386).

Almost surely, 2^61384220 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 61384220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66561264).

61384220 is an abundant number, since it is smaller than the sum of its proper divisors (71738308).

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

61384220 is a wasteful number, since it uses less digits than its factorization.

61384220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 61384220 is about 7834.8082299441. The cubic root of 61384220 is about 394.4744814056.

The spelling of 61384220 in words is "sixty-one million, three hundred eighty-four thousand, two hundred twenty".