61727980 has 24 divisors (see below), whose sum is σ = 130295088. Its totient is φ = 24564288.

The previous prime is 61727977. The next prime is 61727989. The reversal of 61727980 is 8972716.

It is not an unprimeable number, because it can be changed into a prime (61727989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3894 + ... + 11773.

It is an arithmetic number, because the mean of its divisors is an integer number (5428962).

Almost surely, 2^61727980 is an apocalyptic number.

It is an amenable number.

61727980 is an abundant number, since it is smaller than the sum of its proper divisors (68567108).

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

61727980 is a wasteful number, since it uses less digits than its factorization.

61727980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15873 (or 15871 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 61727980 is about 7856.7155987728. The cubic root of 61727980 is about 395.2094813654.

The spelling of 61727980 in words is "sixty-one million, seven hundred twenty-seven thousand, nine hundred eighty".