61994730 has 128 divisors (see below), whose sum is σ = 179159040. Its totient is φ = 13432320.

The previous prime is 61994719. The next prime is 61994743. The reversal of 61994730 is 3749916.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 579337 + ... + 579443.

It is an arithmetic number, because the mean of its divisors is an integer number (1399680).

Almost surely, 2^61994730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61994730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89579520).

61994730 is an abundant number, since it is smaller than the sum of its proper divisors (117164310).

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

61994730 is a wasteful number, since it uses less digits than its factorization.

61994730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 61994730 is about 7873.6732215656. The cubic root of 61994730 is about 395.7779466241. Note that the first 3 decimals are identical.

The spelling of 61994730 in words is "sixty-one million, nine hundred ninety-four thousand, seven hundred thirty".