61805730 has 32 divisors (see below), whose sum is σ = 169524864. Its totient is φ = 14126976.

The previous prime is 61805717. The next prime is 61805743. The reversal of 61805730 is 3750816.

61805730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61805717) and next prime (61805743).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146947 + ... + 147366.

It is an arithmetic number, because the mean of its divisors is an integer number (5297652).

Almost surely, 2^61805730 is an apocalyptic number.

61805730 is an abundant number, since it is smaller than the sum of its proper divisors (107719134).

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

61805730 is a wasteful number, since it uses less digits than its factorization.

61805730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294330.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 61805730 is about 7861.6620380172. The cubic root of 61805730 is about 395.3753415645.

The spelling of 61805730 in words is "sixty-one million, eight hundred five thousand, seven hundred thirty".