61184220 has 96 divisors (see below), whose sum is σ = 177280320. Its totient is φ = 15759360.

The previous prime is 61184219. The next prime is 61184231. The reversal of 61184220 is 2248116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267066 + ... + 267294.

It is an arithmetic number, because the mean of its divisors is an integer number (1846670).

Almost surely, 2^61184220 is an apocalyptic number.

61184220 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 61184220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88640160).

61184220 is an abundant number, since it is smaller than the sum of its proper divisors (116096100).

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

61184220 is a wasteful number, since it uses less digits than its factorization.

61184220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 61184220 is about 7822.0342622620. The cubic root of 61184220 is about 394.0455941121.

The spelling of 61184220 in words is "sixty-one million, one hundred eighty-four thousand, two hundred twenty".