61730286 has 8 divisors (see below), whose sum is σ = 123460584. Its totient is φ = 20576760.

The previous prime is 61730261. The next prime is 61730287. The reversal of 61730286 is 68203716.

It is a sphenic number, since it is the product of 3 distinct primes.

61730286 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61730287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5144185 + ... + 5144196.

It is an arithmetic number, because the mean of its divisors is an integer number (15432573).

Almost surely, 2^61730286 is an apocalyptic number.

61730286 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61730286 is a wasteful number, since it uses less digits than its factorization.

61730286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10288386.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 61730286 is about 7856.8623508370. The cubic root of 61730286 is about 395.2144026438.

It can be divided in two parts, 617 and 30286, that added together give a palindrome (30903).

The spelling of 61730286 in words is "sixty-one million, seven hundred thirty thousand, two hundred eighty-six".