61199320 has 256 divisors, whose sum is σ = 191600640. Its totient is φ = 17031168.

The previous prime is 61199273. The next prime is 61199377. The reversal of 61199320 is 2399116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1423219 + ... + 1423261.

It is an arithmetic number, because the mean of its divisors is an integer number (748440).

Almost surely, 2^61199320 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 61199320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95800320).

61199320 is an abundant number, since it is smaller than the sum of its proper divisors (130401320).

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

61199320 is a wasteful number, since it uses less digits than its factorization.

61199320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 61199320 is about 7822.9994247731. Note that the first 3 decimals coincide. The cubic root of 61199320 is about 394.0780076933.

The spelling of 61199320 in words is "sixty-one million, one hundred ninety-nine thousand, three hundred twenty".